My Body — Practice

Question 1

Name the five major organ systems.

Accepted Answer

Digestive, respiratory, circulatory, skeletal and nervous.

Question 2

Write the path of food through the body in order.

Accepted Answer

Mouth, food pipe, stomach, small intestine, large intestine, and then waste leaves the body.

Question 3

Write the path of air through the body, and name the longest bone.

Accepted Answer

Nose, windpipe, lungs. The longest bone is the femur, the thigh bone.

Question 4

About how many times a minute does the heart beat, and what does the blood carry?

Accepted Answer

Between 60 and 100 times a minute. Blood carries oxygen from the lungs and digested food from the intestine to every part of the body.

Question 5

Which bones protect the brain, and which protect the heart and lungs?

Accepted Answer

The skull protects the brain. The ribs, in twelve pairs, protect the heart and lungs.

Question 6

Give three ways to care for your body and say what each one helps.

Accepted Answer

A balanced diet gives every system what it needs. Daily exercise strengthens the heart, muscles and bones. Good posture keeps the backbone from bending over time.

Question 7

A classmate says digestion happens in the stomach. Correct this and say where most of it really happens.

Accepted Answer

Digestion begins in the mouth, where chewing and saliva start breaking food down, and continues in the stomach. But most of it, and most of the absorbing, happens in the small intestine, which is six to seven metres long.

Question 8

What keeps food from going down the windpipe, and why do you sometimes cough while talking and eating at once?

Accepted Answer

A small flap called the epiglottis covers the windpipe whenever you swallow. Talking while eating can catch that flap out of step, so a little food or drink starts down the wrong pipe and coughing pushes it back.

Practice — My Body

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