chapter 5.8

Heart and blood vessels consists to ...

• circulatory system

• excretory system

• digestive system

Heart is a ... organ

Where blood goes to from heart?

• blood vessels

• outside of the organism

What is the function of cappilaries?

• to connect artery and veins

• to pump blood out

• engine of body machine

... have elastic, smooth walls

• arteries

• veins

• capillaries

Which statement is true for human heart?

• consists four chambers

• removes undigested food

• their shape is like cube

Veins are thinner than the walls of arteries

• true

• false

Ventricle walls are much stronger than atria walls

• true

• false