Mohammad Sheheryar

Red Blood cells

1:The red blood cell contains a red pigment called hemoglobin. Hemoglobin transports oxygen for the lungs to all the parts of the body. 2:The red blood cell has no nucleus,enabling it to carry more hemoglobin and hence more oxygen. 3:Red blood cell has a circular biconcave shape.This increases the surface area to volume ratio of the cell.As a result,oxygen can diffuse into and out of the entire cell at a faster rate.

Mohammad Sheheryar

Alcohol

If alcohol is taken in excessive quantities the person becomes drunk(intoxicated)this means that they feel light-headed,and often they slur their words and lose their balance. It is very dangerous to drive or operate machinery when drunk as reaction times are much slower.(Reaction time is a time taken to respond to an action ,for example,the time taken for a driver to press on the brakes when a child is seen running out into the road.

Mohammad Sheheryar

The Heart

In humans,the heart is located in the middle of the chest. The heart pumps blood,carrying Oxygen to all parts of the body. The heart is a bag of thick muscle,about the size of clenched fist. It has 4 Chambers Their names are written below: 1:Left and right ventricle 2:Left and right atrium

Mohammad Sheheryar

Tobacco

Tobacco is another drug that people can be come dependent on.Cigarettes contain the drug Nicotine which the smoker breaths in,making the fell relaxed.The smoke contains tar with also goes into the lungs and can cause breathing problem and lungs cancer. Teenagers often feel that it is 'grownup' to smoke. Unfortunately ,once they start to smoke they find it very difficult because smoking is Addictive. It is a lot easier to say 'no' if someone offers you a cigarette than to try to smoking later.

Mohammad Sheheryar

The Crucifixion

In about AD 33 Jesus was arrested and tried as a troublemaker by the roman governor,who found he was not guilty.He was then handed over the Jewish religious courts and was found guilty of saying things against the region.The court authorities handed him back to the Roman foe execution by crucifixion,the punishment for cereal criminals.The cross has become the symbol of the Christian Church because people of the christian faith believe that Jesus was crucified. Jesus disciples say that he come back to life three days after his death,and the next forty days he was seen by many of his friends before he went up to heaven.He told them to preach his religion to all the people,and not only to the Jews as he had first intended.

Mohammad Sheheryar

Cattle

Cattle are the most common farm animals.They are assisted by camels and mules to plough,carry fodder and workers from one place to another on the farm.The also supply meat and milk. Fig.7.34 shows the breeds of cattle with their notable functions and the areas where they are particularly found.Traditionally,cattle rearing is the matter of pride and prestige for farmers.Cattle are an important part of farm and are well distributed in most areas.Only in the rugged mountains of Baluchistan and arid areas of the Thar Desert are there few cattle.

Mohammad Sheheryar

Drinking Water

We need to drink at least one litre of water each day to stay healthy.In many parts of the world there is plenty of water-in sea,in rivers and in lakes.But this Water is not pure.It contains impurities,including bacteria,and is not fit to drink.Water ,must me purified before we can drink it. --Mohammad Sheheryar 16:05, 31 October 2011 (UTC)Mohammad Sheheryar

Plants Life Cycle

Plants need food to live,just as humans do.The leaves of a plant trap sunlight and the plant uses this sunlight to produce food. This process is called Photosynthesis. Many plants have flowers in order of reproduce.(Some plants like mosses and ferns do not have flowers.)

--Mohammad Sheheryar 16:12, 31 October 2011 (UTC)Mohammad Sheheryar

Seeds and Fruits

Seeds are formed when the male and female parts(pollen and ovary)combine.The fruit of a plant is made from the swollen outer casing of the ovary,as in an apple. --Mohammad Sheheryar 16:15, 31 October 2011 (UTC)Mohammad Sheheryar

Sound Maker

Sounds travel from there vibrating source,usually through the air,and enter the ears.Sound can travel through solid and liquids.Next time you go swimming and try talking with your friend under the water.You will find that you can hear them although the sound may be muffled by everyone else making a noise.

--Mohammad Sheheryar 10:37, 1 November 2011 (UTC)Mohammad Sheheryar

Day and Night

It takes 24 hours for the Earth to spin around once.This length of time is called a day.As the Earth spins on its axis the part that is facing the Sun will be in the light(Day)The part that is not facing the Sun will be in darkness(Night).

--Mohammad Sheheryar 10:42, 1 November 2011 (UTC)Mohammad Sheheryar

Shadows

When the Sun shines on an object it forms a shadow on the ground.If you were to the place a pole in the middle of the playground and mark the positions of the pole's shadows during the day you will see that the shadow moves.

--Mohammad Sheheryar 10:45, 1 November 2011 (UTC)Mohammad Sheheryar

The Water Cycle

Water evaporates from the sea and forms water vapours.The Water vapours then condences to form clouds.When it rains the water from the clouds returns to the ground.Eventually this water will drain back into the sea.So the water starts in the sea and finishes in the sea,completing the cycle.

--Mohammad Sheheryar 10:51, 1 November 2011 (UTC)Mohammad Sheheryar

Elizabeth

Elizabeth Blackwell was born in England in 1821.In 1832, her family moved to the United States. After her father died, Elizabeth Blackwell, her two older sisters Anna and Marian, and their mother opened a private school in Cincinnati to support the family. Elizabeth Blackwell wanted to be a physician, so she applied at several medical schools but was rejected because no women had even studied medicine before. When she was finally admitted to Geneva Medical College at Geneva, New york, both student and the townspeople were horrified. At first she was not even allowed to watch classroom medical demonstrations, because it was considered inappropriate for a women. However, soon every body were impressed by her ability and hard work. In 1849, Elizabeth Blackwell became the first woman to graduate from medical school. She then went to Paris for further studies. However, a serious eye infection left her blind in one eye, and she had to abandon her plan to become a surgeon. She returned to England and studied at St Bartholomew Hospital. Elizabeth Blackwell went back to New york in 1851, but hospitals and dispensaries refused to hire her. Eventually, she bought a house where she began a private practice, treating women and children. She also wrote lectures on health, which she published in 1852 as The laws of life; with Special Reference to the Physical Education of Girls. In 1853, Elizabeth opened a dispensary in New York City, which was later incorporated as the New York Infirmary for Women and Children. During the Civil War, the Blackwell sisters helped to select and train nurses for service in the War. In November 1868, Elizabeth opened a Women's Medical College at the infirmary. She Moved The Next year to England, where she helped to organize the National Health Society and also founded the London School of Medicine for Women.In 1875, she was appointed as a professor at the London School of Medicine for Children. She retired in 1907. Elizabeth Blackwell Died in Sussex in 1910 at the age of 89.

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