science home test

1.Choose the correct options.

a. ________ are the thickest blood vessels.

• Veins

• Arteries

• Nerves

• Capillaries

b. ________ are the thinnest blood vessels.

• Veins

• Arteries

• Nerves

• Capillaries

c. What do veins do

• They carry oxygen rich blood from different parts of the body to the heart.

• They carry carbon dioxide rich blood from the heart to different parts of the body.

• They carry oxygen rich blood from heart to different parts of the body

• They carry carbon dioxide rich blood from different parts of the body to heart.

d. which blood vessels form a network in the organs

• Veins

• Capillaries

• Arteries

• Canals

2. 2. True or false

3. a. Our heart ,which acts as a pump, pushes blood around in our bodies.

• True

• False

b. pulmonary vein carries deoxygenated blood from our lungs to heart.

• True

• False

c. Arteries have thicker walls than veins.

• True

• False

Our heart lies in the abdominal cavity.

• True

• False

e. Eating junk food everyday does not affect our heart.

• True

• False

3. 3. Answer in detail

4. a.list the different parts of the Circulatory System