Science april 15

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What do red blood cells carry to the cells?

oxygen and nutrients
What do white blood cells do?

work to fight germs that enter the body
What are the upper chambers of the heart called?

right and left atrium
Your heart is about the size of what?

your fist
How does air travel to the lungs?

from the nose or mouth, through the trachea, into the bronchial tubes then to the lungs
How much does each lung weigh?

about 1 pound
What system are the sweat glands part of?

the excretory
What are the tiny fingerlike projections that absorb digested food in the small intestines

villa
What do the kidneys and the liver work to remove from your body?

waste called urea
What are two kinds of carbohydrates?

starch and sugar
the two vitamins and minerals the bones need to stay strong

calcium and phosphorus
What are the two parts of the nervous system called

Central nervous system (brains and the spinal cord) and the outer nervous system (the nerves)