Chapter 11: Transport System (True or False)

Valves found in the heart and veins ensure blood flows in forward and backward directions.

• True

• False

Answer explanation

Valves help to prevent blood from flowing backwards.

Of all the heart chambers, the left ventricle has the thickest wall and exerts the highest pressure when the heart muscle pumps.

• True

• False

The human transport system is made up of three main components: blood, blood vessels and the heart.

• True

• False

All arteries carry oxygenated blood away from the heart.

• True

• False

Answer explanation

Pulmonary artery carries DEOXYGENATED blood from the heart to the lungs.

Blood transports oxygen, which is carried by white blood cells.

• True

• False

Answer explanation

Blood transports oxygen, which is carried by RED blood cells.

The heart is an organ that pumps _____ throughout the body.

The right atrium receives deoxygenated blood from the body.

• True

• False

Veins have thicker walls than arteries to accommodate high pressure.

• True

• False

Platelets are responsible for transporting nutrients in the blood.

• True

• False

Capillaries are the largest blood vessels in the body.

• True

• False