Question

3.Why is the bone marrow important to the body?
A.It stores much fat.
B.It makes the bone strong.
C.It produces red blood cells.
D.It produces new bone cells.

4.What involuntary muscles that are present only in heart?It allows the heart muscles to control rhythmically.
A.Smooth muscles
B.Cardiac muscles
C.Skeletal muscles
D.Voluntary muscles

5.What organ covers your entire body?
A.Skin
B.Bone
C.Muscles
D.Hair

6.Where does final digestion occur?
A.Mouth
B.Large intestine
C.Stomach
D.Small intestine

7.In which part of the digestive system does digestive start?
A.Esophagus
B.Mouth
C.Stomach
D.Small intestine

8.When is food useful to the body?When it reaches the?
A.Body cells
B.Blood
C.Intestine
D.Stomach

9.How does the body use the energy released in its cells?
A.To rest the body
B.To lower body temperature
C.For making oxygen
D.For muscles to move

10.What happens when you breathe in air?
A.The diaphragm expands and the rib cage contracts.
B.The diaphragm contracts and the rib cage expands.
C.The diaphragm expands and the rib cage collapses.
D.The diaphragm contracts and the rib cage remain the same.
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Answer 1

Answer:

• It produces red blood cells

• Cardiac muscles
• Skin
• Small intestine
• Mouth
• Stomach
• For muscles to move
• The diaphragm contracts and the rib cage expands.

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Answer 2

Answer:

3 . It makes the bone strong.

4 . Cardiac muscles

5 . skin

6 . small intestine

7 . mouth

8 . stomach

9 .For making oxygen

10 . When you inhale (breathe in), air enters your lungs and oxygen from the air moves from your lungs to your blood. At the same time, carbon dioxide, a waste gas, moves from your blood to the lungs and is exhaled (breathe out). This process is called gas exchange and is essential to life..

Explanation:

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