blood vessels

What are the components of blood?

• Plasma

• Platelets

• Red blood cells

• White blood cells

How are capillaries adapted for their function?

• Have partially permeable walls

• One-cell thick endothelium

• Presence of valves

• Large lumen

A difference between veins and arteries is that veins have narrow lumens and arteries have wide lumens

• True

• False

What is the purpose of the valves located in veins?

• To keep the vein open for blood to flow through

• To keep blood flowing in one direction through the vein

• To allow blood to flow in both directions within the vein

• To allow the blood to flow back down to the lower parts of the body

What is plasma?

• only white blood cells

• only red blood cells

• fluid part of blood

• hemoglobin

The job of the capillaries is to assist in the exchange of only gases such as carbon dioxide and oxygen between the blood and the body tissues.

• True

• False

What are the three kinds of blood vessels in the human body?

• Veins, Capillaries and Vena Cavas

• Veins, Aorta, and Vena Cavas

• Aorta, Capillaries and Veins

• Capillaries, Veins and Arteries

The thick walls of the capillaries allow the passage of food, water, and oxygen pass from the blood vessels into the body cells.

• True

• False

What is the job of the arteries?

• To take blood throughout the body

• To take blood away from the heart

• To take blood throughout the heart

• To take blood to the heart

What is the function of veins?

• To take blood away from the heart

• To take blood throughout the heart

• To take blood throughout the body

• To take blood to the heart