Circulatory System and Blood Quiz

Arteries carry deoxygenated blood.

Veins carry oxygenated blood.

Capillaries have a thick wall made of collagen and smooth muscle.

The muscle layer surrounding the arterioles can contract, causing the lumen of the arteriole to dilate.

Venules are small arteries that carry oxygenated blood.

The pulmonary artery carries deoxygenated blood.

The pulmonary vein carries oxygenated blood.

The aorta carries blood to the head and the rest of the body.

The hepatic artery supplies blood to the intestines.

The interior vena cava carries blood back to the heart.

The circulatory system is responsible for ensuring all cells receive oxygen and nutrients, and removing metabolic waste before it can cause damage.

There are two types of circulatory systems: open systems and closed systems.

In open circulatory systems, the heart pumps haemolymph into an open central cavity called the haemocoel.

Open circulatory systems are found in animals like snails and insects.

Closed circulatory systems always enclose the blood in blood vessels.

Tissue fluid acts as a medium for substance exchange between the blood and cells in closed circulatory systems.

Closed circulatory systems are more efficient than open ones because the blood can be pumped around the body faster.

Closed circulatory systems allow for the flow of blood to different organs to be increased or decreased.

In advanced animals, like mammals, a two-circuit system is used for circulation.

The pulmonary circuit in the two-circuit circulatory system pumps oxygen-rich blood to all the cells of the body.