Circulatory System - ICT Training

Blood vessels that carry deoxygenated blood to the heart.

• Capillaries

• Arteries

• Veins

Answer explanation

Veins have one-way valves instead of muscles, to stop blood from running back the wrong way. Generally, veins carry deoxygenated blood from the body to the heart, where it can be sent to the lungs.

The other name for circulatory system.

The central organ of the circulatory system.

Answer explanation

Blood goes from the heart to the lungs to get oxygen. The lungs are part of the respiratory system. Your heart then pumps oxygenated blood through arteries to the rest of the body.

Capillaries are delicate blood vessels that exist throughout your body

• True

• False

Answer explanation

Capillaries are the smallest blood vessels in your vascular system. They transport blood, nutrients and oxygen to cells in your organs and body systems.

Blood vessels that carry oxygenated blood away from the heart.

• Veins

• Arteries

• Lungs

Answer explanation

Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

The actual site where gases and nutrients are exchanged.

Answer explanation

Exchange of Gases, Nutrients, and Waste Between Blood and Tissue Occurs in the Capillaries. Capillaries are tiny vessels that branch out from arterioles to form networks around body cells.

Why is the circulatory system important?