Circulatory System

___ are tiny blood vessels that carry blood to an from almost all body cells and connect arteries and veins.

• arteries

• veins

• capillaries

___ takes place when blood travels from the heart, through the lungs, and back to the heart.

• pulmonary circulation

• systemic circulation

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

Arteries carry oxygen rich blood away from the heart.

• True

• False

The job of the heart is to . . .

• pump blood around the body.

• send food to the small intestines.

• break down food.

• give energy to the body.

The heart is about the size and shape of your . . .

• head

• fist

• hand

• foot

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

The circulatory system works with the ___________ system to provide our body with oxygen.

• respiratory
• digestive
• muscular
• skeletal

Which is responsible for providing oxygen to cells?

• respiratory system
• circulatory system
• muscular system
• nervous system

In which system of the human body does the heart belong?

• Nervous
• Skeletal
• Cardiovascular
• Digestive