1.
Multiple Choices. Choose and write the letter of the correct answer on the line before the number.
.
3.
C.
1. What is the main support system of the body?
a. blood
b. bone c. muscle d. skin
2. Which organs are protected by the rib cage?
a. heart and lungs
C. ovaries and testes
b. brain and spinal cord d. small and large intestines
3. If there were no bones, the muscles would drop to the ground. Which function of the bone
is shown here?
. a. protects the heart and lungs
b
b. provides leverage for movement of muscles
forms a strong case for delicate organs
d. provides anchor to which muscles are attached
4. In which part of the body where the digestion start?
a. throat b. mouth
C. stomach
d. intestine
5. Which is a long, straight muscular tube that connects the mouth to the stomach?
a. spinal cord b. blood vessel C. esophagus
d. intestine
6. What moisture is produced by the skin through its sweat glands?
a. mucus b. melanin
b.
c. perspiration d. urine
7. What structural fibrous protein are hair and nails made of?
a. keratin . b. amino acids c. collagen d. hemoglobin
8. In which part of the lungs where gases are exchanged?
a. trachea
b. alveoli
.
c. bronchi
d. larynx
9. What is the function of the cilia or pilli in the trachea?
a. to trap particles of dust and dirt
b. to moisten and warm the dust
c. to direct the flow of air
d. to add moisture to the air​