IB Biology Topic 6.2

These carry blood to the heart:

• arteries

• veins

• capillaries

• arterioles

These carry blood away from the heart

• arteries

• veins

• venules

• capillaries

These have muscular walls:

• capillaries

• veins

• venules

• arteries

These have valves that prevent backflow of blood

• arteries

• veins

• arterioles

• capillaries

Where material exchange takes place between the cells and blood vessels:

• arteries

• veins

• venules

• capillaries

Largest artery in the human body:

• Pulmonary artery

• femoral artery

• aorta

• carotid artery

Carry oxygenated blood back to the heart, only type of these to do this:

• pulmonary arteries

• pulmonary veins

• pulmonary capillaries

• aorta artery

Gas, nutrient, and waste exchange occur between the __________ and the tissues of the body.

• veins

• arteries

• capillaries

• legs

Valves in veins

• make the use of a skeletal muscle pump unnecessary for venous blood flow

• are the leading cause of high blood pressure.

• cause venous blood flow to go in only one direction

• are formed of the tunica media

Which is true about capillaries?

• they have pores to increase permeability

• they have thick muscular walls

• they are the biggest blood vessels in the body

• they carry blood at high pressure