Thursday, May 31, 2012

The reproductive system

The reproductive system produces specialized cells

The female reproductive systemTwo functions: to produce egg cells, and to protect and nourish the offspring until birth.
Ovaries: two reproductive organs which contains egg cells.
The pituitary gland releases a hormone that stimulates some of the eggs to develop and grow.
The ovaries produce hormones that get the uterus ready to receive the egg.


Menstruation
After egg fully develops-> hormone signals to release the egg->egg moves to a fallopian tube->uterus-> fertilization occurs or menstruation occurs.

The male reproductive system
coiled tubes inside testes produces sperm which is a single cell with chromosomes (head) and tail.

The production of offspring includes fertilization, pregnancy, and birth.
Fertilization
1. Egg is released from ovary.
2. Fertilization occurs
3. Fertilized egg begins to divide.
4. Dividing egg continues down fallopian tube.
5. Embryo moves towards the uterus.

Pregnancy
The nine months of pregnancy can be divided into three periods
2 weeks- embryo grows rapidly, placenta develops
8 weeks- embryo becomes a fetus
12 weeks- bones of fetus develop further


Labor and Delivery
The three stage labor- muscular contractions of the uterus->fetus is pushed out->delivery of the placenta.
-The identical twins are produced when a single fertilized egg divides in half early in embryo development. Each half then forms one complete organism or twin.

SS Ch.8 Lesson1

The Land of Greece
Present-day Greece is located on the Balkan Peninsula.
Mountains cover nearly ¾ of mainland Greece, where the
soil is thin and rocky. About 2,000 islands surround Greece’s
jagged coastline.


Life Among the MountainsGreeks settled in narrow valleys in the mountains
Separation by mountains kept them from uniting
Rivers were no use for travel
Agriculture was difficult because only 20% of the land is good for agriculture
Raising animals was difficult as well.
Life Among the Mountains
Ways of adapting
Raised small animals, such as sheep, goats, pigs
from these animals, they got wool, hides and cheese
Farmed barley, wheat, olives, and grapes
Use of olives
Cooking, lamp fuel, bathing, perfumes

Life by the SeasThe surrounding seas provided an abundance of fish and an easier way to travel rather than hiking
The Greeks started a seafaring culture of fishers, sailors, and traders.
Greeks settled near shores and contacted other settlements through the sea, exchanging ideas and religious beliefs

Poseidon, Greek god of the sea, ruled and watched over sailors and their boats.

Exchange and Trade
Surplus helped Greeks expand
Farming olives, grapes, and grains in dry climate and rocky soil helped them grow
As a result of farming, craft workers fashioned tools, containers, clothing, and decorative objects from wood, clay, bone, wool, stone, and metal.

JarsA need for jars grew because of wine and olive oil had to be stored
Greeks began exporting goods, of which wheat was a popular export item.
Trade led to exchange of ideas, and this led to the use of metals for objects like weapons, tools, and bowls.

Farming surpluses of olives, grains,
and grapes allowed the early
people of Greece to trade for
resources they did not have.
Food surpluses and improved
farming techniques led to
new kinds of jobs.

Tuesday, May 29, 2012

The nervous system

Senses connect the human
body to its environment
Sight
Light rays enter the eye and they
are first bent by the cornea.
The rays pass through the pupil and
through the lens.
The rays form an upside down image
on the retina at the back of the eye

The nerve sends the information to
The brain where the stimulus is processed.
Hearing
Sound waves enter the ear and vibrates eardrum. When the sound waves strike eardrum, it transmits to a tiny bone called the stirrup, hammer, and anvil.
Cells in the cochlea send a message to the brain.

Touch
The nervous system is divided in to two:The central nervous system & the peripheral nervous system




Sunday, May 20, 2012

SS Chapter 7.2 Continuing Traditions

The MaccabeesIn 332 B.C., the Judeans faced the Macedonian emperor, Alexander the Great(Greek)
Before, Jewish people were allowed to practice their religion but Alexander the Great outlawed Judaism and forced them to worship Greek gods.

Judah Maccabee led a revolt known as the Revolt of the Maccabees
He recruited thousands and led to recapture Jerusalem and all of Judaea
He restored Jewish worship in the Temple

In 63 B.C., the Roman Empire took control of Judaea and chose loyal Jewish kings
The Jews were mistreated so they rebelled

When the second Temple was destroyed, Rabbi Yohanan ben Zaccai established a Jewish school in the south of Jerusalem. This grew as the center of Jewish life and synagogues continued to help Judaism survive
In A.D 132, the Jewish people, led by Simon Bar Kokhba tried to overthrow the Romans
However, they were crushed and sent to exile
They would not rule Judaea again for 1,800 years

The Greeks ruled Judaea until
Judah Maccabee led a revolt and
recaptured Jerusalem. The Roman
Empire took control of Judaea and
eventually sent nearly all of the
Jews into exile.

The Writings of JudaismThe Hebrew Bible is both history and literature
The Hebrew Bible has three parts:
The Torah, or “the Law” (this includes the 10 commandments)
Nevi’im, “the Prophets” includes words of Prophets who spoke to Jews as representatives of God
Ketuvim, “the Writings” Ketuvim includes stories
The most popular, a story about friendship and loyalty
Ruth

Genesis, the first book of the Torah, describes how God created the universe
The most famous story, Noah’s Ark.

Because the Torah is difficult to understand, scholars created writings called Commentaries to explain questions


Rabbi Hillel devoted life to studying and teaching the Torah


Jewish traditions and InfluenceRosh Hashanah
First day of Jewish New Year
Beginning of the ten High Holy Days
Day of judgment
Examines their actions and reflect on sins

Yom Kippur
Last of the High Holy Days
Day of Atonement (asking for forgiveness)

Jewish traditions and InfluenceJudaism influenced Christianity and Islam
Christianity
Founded on Jesus

Islam
Believe Muhammad as God’s final prophet
Muhammad claims to be descendent of Abraham’s son, Ishmael.

They all share a belief in one God
Jewish traditions and Influence


Saturday, May 19, 2012

Human Biology Ch.3.3

The skin is part of your body’s integumentary system.
Your skin fulfills several vital functions:
-Skin repels water
-Skin guards against infection
-Skin helps maintain homeostasis
-Skin senses the environment

Epidermis : An outer layer. Contain many protein fibers that give the skin tough and protective qualities. (These cells are formed in the deepest part of the epidermis)


Dermis: An inner layer. Made of tissue that is strong and elastic. The dermis is rich in blood vessels, sweat and oil glands, hair, nails and sensory receptors.


Fatty tissue lies beneath a layer of dermis. It protects the body from extremes in temperature and it stores energy for future use.

Sweat glands help control body temperature and oil glands protect the skin by keeping it moist. They both are open to the surface through pores.

Oil glands: Scecrete an oil that moistens skin and hair and keeps them from becoming dry. Skin oils add flexibility and provide part of the skin’s waterproofing.

Sweat glands help maintain homeostasis: sweat glands secrete sweat when you become too warm. The sweat evaporates and cools the skin’s surface.

Hairs and Nails
Many cells in your hair and nails are actually dead but continue to perform important functions.

Hair: Shields your head from the sun and traps heat close to your head to keep you warm during winter. (body hair works the same way.)

Nails: Protect the tips of the fingers and toes from injury. Both are thick and tough epidermal cells which grows from the nail bed

Sensory Receptors
Part of the nervous system, sensory receptors are attached to the nerves in skin.

Your skin contains receptors that sense heat, cold, pain, touch, and pressure.

ex. Temperature receptors sense when an object is hot. -> pain receptors send signals to your brain telling you that you have been burned.

Growth
Through all your body’s growth and change, your skin has to grow, too.

From the base of the epidermis, most of the cells constantly grow and divide to form new cells as the older epidermal cells die or gets to be brushed off during daily activity.

Every 2-4 weeks, your skin surface is entirely new.
A percentage of household dust is actually dead skin cells.

Injuries and HealingBlisters burns, cuts, and bruises are some injuries result from the skin’s contact with outside world.

-The skin can usually repair simple injuries. (click->)

Burns can be caused by heat, electricity, radiation, or certain chemicals.
First degree burns heals in a day or two. (sunburns)
*Skin cells produce more of the skin pigment melanin when exposed to the Sun and the amount of melanin in your skin determines how dark your skin is.
Second degree and third degree burns can result fluid loss, infection and other complication as well as death.

Severe cold can also damage skin as well. The cells might get damaged by freezing and can cause frostbite.

Wednesday, May 9, 2012

SS Ch.7 Lesson1

The Babylonian CaptivityThe Babylonians conquered Judah and sent the King and 10,000 Judeans to Babylon
The Babylonians chose a new king, from Jerusalem, to rule
The king and other citizens rebelled against the Babylonians


The Babylonians conquered them again the second time and out of anger, they destroyed Jerusalem
The Babylonians sent every citizen of Judah to live in Babylon
The Babylonian Captivity, also known as the Babylonian Exile

Jeremiah told the exile they were being punished for not worshipping God
Jeremiah gave hope by saying that they will be rewarded if they change their ways.
“When you call Me, and come pray to Me, I will give you heed[pay attention] to you… and I will restore your fortunes… and I will bring you back from the place from which I have exiled you.”

Judaism Changes
Life under Babylonians differed from the rule of the Assyrians
Jeremiah promised that they would return to Judah if they kept worshipping God. He said that God could be worshipped anywhere and not just in the Temple

The Jewish DiasporaAs the Jews in exile began to feel at home in Babylon, a prophet reminded that God would give them the land of Canaan.

Cyrus, from the Persian Empire, conquered Babylon.
Cyrus allowed the Jews to reclaim Canaan and build a temple there as long as they followed his rule

After the Babylonian exile, not all Jews returned to Canaan and this began a Jewish Diaspora
Scattering of Jews outside their homeland

Ezra and the TorahA scribe named Ezra restore Judaism in Jerusalem.
He led Jews back to Jerusalem from Babylon
Ezra read about Jewish laws from the Torah for 7 days straight.
Many renewed their faith

SummaryIn 586 B.C., the Babylonians destroyed Jerusalem and the Temple. They sent many Jews into exile in Babylon. The Jewish people kept their faith by changing the practices of Judaism. When the Persian Empire conquered Babylon, King Cyrus allowed Jews to return to Canaan and to rebuild the temple. Many Jews, however, remained outside Canaan, forming the Jewish Diaspora.

Human Biology Ch.3.2

The integumentary, respiratory, and digestive systems are the first line of defense against pathogens. (disease causing agents which can enter through skin, air, food, and liquids you drink.)

Integumentary system-forms physical barrier to pathogens. (ex. Skin, substances contained in tears…etc)

- A common way pathogens can enter the body is through a cut. The circulatory system is then able to help defend the body with blood cell which respond to foreign materials.

Respiratory system
-Cilia and mucus traps and expels the particles in the air.

-Sneezing and coughing are two ways to defend the body.

Digestive system-destroys pathogens that enters through food and drink with saliva, mucus, enzymes, and stomach acids.

The body relies on the immune system to respond when foreign materials manage to get past the first line of defense.

Tissues in the bone marrow, the thymus gland, the spleen, and the lymph nodes produce white blood cells
to destroy pathogens.


Some white blood cells produce a nonspecific response to injury or infection.

Some white blood cells produce proteins called antibodies, which are part of a specific immune response to foreign materials.


Symptoms of illnesses are result of the immune system’s response to foreign materials in the body.

Nonspecific response occurs first as histamine is released from irritated or damages tissues, increases blood flow and causes inflammation.

When a foreign material affects more than one area of your body, many tissues produce histamine and results your whole body temperature to rise.


Specific responses are triggered by antigens and provides protection from future exposure to the same material.

Antigen: a chemical marker on a cell’s surface that indicates whether the cell is from your body or is a foreign material.

Three major types of white blood cells that functions together in a specific response: phagocytes, T cells, and B cells
Phagocytes ingest and break down foreign materials -> Small pieces of the foreign materials (antigen)are incorporated into the surface of the phagocyte’s cell membrane -> they are detected as foreign by T cells-> T cells divide rapidly and some T cells attack the foreign antigens-> B cells recognize the same foreign antigen, divide rapidly and begin to produce antibodies that help destroy pathogens->Antibodies attach to the foreign antigens, marking the pathogens for killer T cells.




Human Biology Ch.3.1










Thursday, May 3, 2012

S.S. Ch.6 Lesson 3

Israel and JudahIn 928 B.C., Rehoboam refused
to end taxes and forced labor in
the northern part of the
kingdom of Israel. As a result, the
northern tribes rebelled and caused
Israel to split into two parts: a northern kingdom called Israel and a southern kingdom called Judah.


Solomon was disliked the northern Israelite tribes because they thought he gave special treatment to his own tribe, Judah.
The tribe of Judah did not have to pay taxes or work on building projects
When Solomon died, Rehoboam became king

Israel(the northern tribes)
Samaria was established as the capital
Judah(the southern tribes of Judah & Benjamin)
These tribes remained loyal to Rehoboam

Judah
Small but strong
Kings came from one family, the House of David
Stable government

Israel
Built holy place in Samaria
Higher population than Judah
Faced hard lives
Fought over who would lead
Poor
Turned away from God
Israel Falls to the Assyrians
In about 750 B.C., prophets warned the kingdom of Israel of punishment for not following god.
Ahijah warned the kingdom of Israel “The Lord…will uproot Israel from this good land that He gave to their fathers and will scatter them…”
Israel Falls to the Assyrians


In 722 B.C., Assyria conquered the weak and disorganized kingdom of Israel
Sargon II boasted about his capture of the capital, Samaria
Assyrians’ two step plan
1. Forced conquered people to leave their land
2. Brought Assyrians into the land
Israel Falls to the Assyrians
Most of the Israelites had to leave the land but the few that were allowed to stay mixed with the Assyrians

The new population became to be known as Samaritans
The Israelites forced from Canaan were known as “the ten lost tribes of Israel”
The Assyrians planned to conquer Judah
Israel Falls to the Assyrians
Judah Remains Independent

In 701 B.C., Hezekiah, the king of Judah, protected Jerusalem from the Assyrian invasion
The Assyrians had them completely surrounded.
Judah was able to outlast the attackers because Hezekiah built a tunnel to supply water from a spring

Israel and Judah

In 928 B.C., Rehoboam refused
to end taxes and forced labor in
the northern part of the
kingdom of Israel. As a result, the
northern tribes rebelled and caused
Israel to split into two parts: a northern kingdom called Israel and a southern kingdom called Judah.


Judah
Small but strong
Kings came from one family, the House of David
Stable government

Israel
Built holy place in Samaria
Higher population than Judah
Faced hard lives
Fought over who would lead
Poor
Turned away from God


In 722 B.C., Assyria conquered the weak and disorganized kingdom of Israel
Sargon II boasted about his capture of the capital, Samaria
Assyrians’ two step plan
1. Forced conquered people to leave their land
2. Brought Assyrians into the land

Most of the Israelites had to leave the land but the few that were allowed to stay mixed with the Assyrians
The new population became to be known as Samaritans
The Israelites forced from Canaan were known as “the ten lost tribes of Israel”
The Assyrians planned to conquer Judah

In 701 B.C., Hezekiah, the king of Judah, protected Jerusalem from the Assyrian invasion
The Assyrians had them completely surrounded.
Judah was able to outlast the attackers because Hezekiah built a tunnel to supply water from a spring

S.S. Ch.6 Lesson 2

The Israelites returned to
Canaan 40 years after the
Exodus and lived there as
12 independent tribes,
but enemy attacks
made them unite
under one king, Saul

The Israelites Get a KingAfter 40 years the Exodus, the Hebrews reached Canaan
Enemies surrounded them where they settled
In Canaan, the Israelites lived as 12 independent tribes with it’s own leader
In war, a judge rose to power to lead the people but their power was temporary
The Israelites Get a King
The Israelites were weak against attackers when they were not united
They decided they needed a king to unite
The Israelites went to Samuel and asked to appoint a judge but Samuel reminded that the only leader they needed was God.

Saul and David
King Saul did not follow
God’s commands, so Samuel r
eplaced Saul with David, a strong
ruler who established Jerusalem
as the center of government
and religious life in Israel.

King Saul defeated many Israelites’ enemies but did not follow God
God rejected Saul and died in war
David, of the tribe of Judah, had become the new king
Under King David’s rule, Israel stretched from Egypt to Mesopotamia
David named Jerusalem as the new capital of the kingdom of Israel

Under David, it grew as the center of government and religious life
The Kingdom of Solomon


Solomon, David’s son, became king and began to build a temple in Jerusalem
The purpose of the temple:
Place of worship
Keep the Ark of the Covenant
Box that held the tablet Ten Commandments were written
The Kingdom of Solomon

“the Temple”
Limestone
Inside lined with cedarwood
Placed the Ark covered in gold and colored glass, in the temple
The Kingdom of Solomon
Solomon also:
Built forts
Grain store houses
Water systems
Placed heavy taxes
Forced thousands to work as builders

The Kingdom of Solomon
Divided kingdom into 12 tax districts
Each had its own governor and public service
Egypt, Phoenicia, and Israel had friendly trade relationships
Solomon protected his trade routes with an army

Life in Ancient IsraelReligious beliefs and laws continued to guide everyday life
Deborah, a woman judge and an advisor, rose to power
Solomon is know for his wisdom and proverbs
Also he is the author of two books:
Song of Songs
Proverbs