Circulatory & Respiratory Systems

What is the primary function of the major systems of the human body as described in the learning material?

• To perform individual tasks without interacting

• To maintain homeostasis

• To provide energy to the body

• To regulate body temperature only

What is one of the functions of the cardiovascular system?

• To produce blood cells

• To carry food, water, oxygen, and other needed substances to the body's cells

• To regulate body temperature

• To control muscle contractions

What is another function of the cardiovascular system?

• To synthesize vitamins

• To digest food

• To carry waste products away from the body's cells

• To send nerve signals to the brain

What is the function of the right atrium in the circulatory system?

• It pumps oxygen-rich blood to the rest of the body.

• It receives oxygen-poor blood from the body and pumps it into the right ventricle.

• It pumps oxygen-rich blood into the left ventricle.

• It prevents blood from flowing backward.

What does the left ventricle do?

• It receives oxygen-poor blood from the body.

• It pumps oxygen-poor blood to the lungs.

• It pumps oxygen-rich blood to the rest of the body via the aorta.

• It prevents blood from mixing with oxygen-poor blood.

What is the role of the septum in the heart?

• It sends a signal that makes heart muscle cells contract.

• It pumps blood throughout the body.

• It is a flap of tissue that prevents blood from flowing backward.

• It separates the left side of the heart from the right side and prevents oxygen-rich blood from mixing with oxygen-poor blood.

What is the function of the pacemaker in the heart?

• It is a group of cells in the right atrium that send a signal that makes heart muscle cells contract, making the heart beat.

• It receives oxygen-rich blood from the lungs.

• It pumps oxygen-poor blood to the lungs.

• It is a flap of tissue that prevents blood from flowing backward.

What is the purpose of the valve in the circulatory system?

• It pumps blood throughout the body.

• It separates the left side of the heart from the right side.

• It is a flap of tissue that prevents blood from flowing backward.

• It sends a signal that makes heart muscle cells contract.

What is the function of arteries in the circulatory system?

• To carry blood away from the heart

• To carry blood back to the heart

• To exchange substances between blood and body cells

• To prevent blood from flowing backward

What are capillaries?

• The largest artery in the body

• Blood vessels that carry oxygen-poor blood from the right side of the heart to the lungs

• Tiny vessels where substances are exchanged between the blood and body cells

• A major vein that carries blood from the lower body to the heart