Blood Vessels

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

Oxygen and carbon dioxide are transported between the blood and alveoli by way of

• exocytosis and endocytosis by endothelial cells

• diffusion from areas of higher concentration to lower concentration

• pinocytosis using fluid-filled vesicles

• active transport (using ATP) by protein carriers of endothelial cells

What is the space between the structure of a blood vessel?

• Artery
• Lumen
• Gap
• Loomen