Circulatory System

Which of the following best describes the main purpose of the atria?

• Receive blood which returns back to the heart

• Act as reservoirs for blood

• Veins lead to the atria

• Pump blood away from the heart

Which side of the heart is responsible for pumping deoxygenated blood to the lungs?

Which of the following helps arteries perform their main function?

• Thin walls made of muscle and elastin

• Narrow lumen

• Thin outer layer of collagen

• One-cell thick walls

What is the largest blood vessel in the human body?

• Superior vena cava

• Inferior vena cava

• Aorta

• Femoral artery

Most arteries carry oxygenated blood. Which one(s) carries deoxygenated blood?

• Coronary artery

• Aorta

• Pulmonary artery

• Iliac artery

Which processes may occur in the capillaries?

• Diffusion of oxygen into cells/tissues

• Movement of wastes into the capillaries

• Exchange of nutrients to cells/tissues

• All of the above

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-4

Which of the following assists capillaries with their main function?

• Thick walls made of elastin and muscle fibers

• Wide lumen

• Presence of valves

• One-cell thick walls

Contraction of which type of muscle can assist with blood flow to the heart in veins?

• Skeletal

• Smooth

• Cardiac

• Myocardial

Which valve separates the left atrium and ventricle?

• Atrioventricular valve

• Pulmonary valve

• Aortic valve

• Left atrioventricular valve

What is the main purpose of valves found in the heart?

• Assist blood moving between ventricles and atria

• Prevent blood from moving backwards

• Speed up the velocity of blood travelling through the heart

• All of the above