Body Systems Part 1

The circulatory system uses blood to move oxygen, wastes, and ____________ through the body.

nutrients

The heart is an organ of the ______________ system.

circulatory

The heart is made of ______________ tissue.

muscle

The heart has ______________ chambers.

four

The _____________ cells absorb oxygen in the lungs and carry it through the body.

red blood

The _________________ cells help fight infection in the body.

white blood

________________ are the large blood vessels that carry the oxygen rich blood away from the heart.

Arteries

_____________ are the smallest blood vessels.

Capillaries

_______________ are the blood vessels that carry the blood back to the heart.

Veins

The ______________ that your cells need enters the body through the respiratory system.

oxygen

In the respiratory system, air travels into and out of the ______________ when we breathe.

lungs

Another name for the windpipe is the _______________.

trachea

The trachea branches into two pipes in your lungs called ____________.

bronchi

The smallest tubes in the lungs end in tiny air sacs called _______________.

alveoli

Your _____________ system provides the nutrients your cells need to produce energy by breaking down food into nutrients and then getting the nutrients into the blood.

digestive

____________ glands help to moisten and break down the food as you chew.

Saliva

The _______________ is a long tube that carries the food to the stomach.

esophagus

After several hours in the stomach, the partly digested food moves into the __________ where chemicals finish digesting it.

small intestine

Nutrients move from the small intestine into the blood by traveling through tiny tubes sticking out of the wall of the small intestine called ___________.

villi

The ______________ produces a chemical called insulin that controls how much sugar is in the blood.

pancreas

The function of the ___________ system is to remove cell wastes from the blood.

excretory

Water and a waste called urea flow from the liver into the _________________ .

kidney

______________ is a mixture of urea and water.

Urine

Urine is stored in an organ that empties when full called the __________________.

bladder