1.why is respiratory system very important to the body?

A.It enables carbon dioxide to get into the body.
B. it consists of body parts that help the body receive oxygen.
C. It helps distribute carbon dioxide to the blood.
D.It enables the blood to circulate in your body.

2.how does oxygen in the air get into the blood?

A.through the nose
B.through the throat
C.through the mouth
D.true that tiny capillaries

3.what will happen to the cells of the body when there is absence of oxygen?

A.the cells will continue to grow and multiply.
B.the cells will be inactive.
C.the cells will survive.
D.the cells will die.

4.how can you keep your heart strong?

A.eating heart-shaped candy
B.doing activities like playing outside,riding your bike,and swimming
C. smoking
D. sleeping 18 hours a day

5.what are tubes that carry blood back to the heart?

A. arteries
B. veins
C.pipes
D.tubes

6.which of the following describes the correct passage of blood originating from the left leg?

A.vena cava-left atrium-right atrium-lungs-left ventricle-right ventricle-aorta
B.vena cava-right atrium-left atrium-lungs-right ventricle-left ventricle-aorta
C. Vena cava-left atrium-left ventricle-lungs-right atrium-right ventricle-aorta
D.vena cava-right atrium-right ventricle-lungs-left atrium-left ventricle-aorta

7.what is the functional unit of the nervous system?
a. brain
b. neurons
c.muscles
d.bones

8.what controls and coordinates the activities of the whole nervous system?

a.central nervous system
b.sympathetic nervous system
c.nervous system
d.brain

9.which of these is not a function of the peripheral nervous system?

a.collects information from the sense organ
b.transmits information to the central nervous system
c.delivers decisions to the body part which will perform the action
d.delivers oxygen to the different parts of the body

10.how do sympathetic and parasympathetic nerves work?

a.when does sympathetic nerve produce an effect,the parasympathetic nerve produce the same effect.

B.when the sympathetic nerve produce an effect,the parasympathetic nerve produce an opposite action.

C.they work separately.

D.they allows messages to pass through them freely.



plssss po paki answer ng mabuti at tama kailangan ko po ng answer :(​