Circulation system

The role of Circulation System

• To transport substances throughout the body

• It carries oxygen and nutrients to cells

• It receives carbon dioxide and waste products from cells

• All of the above

The human heart is:

• made of muscle

• a pump

• has four chambers

• beats faster when you exercise

• All of the above

The lub dub sound of the heart beating is the sound of:

• A the muscles of the heart contracting.

• the heart valves opening and closing.

• the blood moving in and out of the heart.

• the blood moving in and out of the lungs

The heart valves do all of the following, EXCEPT:

• separate the atria and the ventricles.

• keep the blood flowing forward.

• regulate the heart’s contractions

• include the mitral valve and bicuspid valve.

The blood comes back to the heart from the body through two big veins called the:

• pulmonary veins

• right atria

• aortas

• vena cavas

The first chamber of the heart the blood from the body enters is the:

• left atrium

• right atrium

• left ventricle

• right ventricle

The valve between the right atrium and the right ventricle is called the:

• bicuspid valve

• tricuspid valve

• mitral valve

• None of all above

The blood is pumped to the lungs from the heart through the:

• aorta

• pulmonary veins

• pulmonary arteries

• vena cavas

The blood leaves the heart to the body through the:

• aorta

• pulmonary veins

• pulmonary arteries

• vena cavas

The only veins in the body that carry oxygenated blood are the:

• subclavian veins

• pulmonary veins

• coronary veins

• vena cavas