Heart and blood flow step by step

What is the heart?

The heart is a muscular organ that pumps blood throughout the body.

Function of arteries

Arteries carry oxygen-rich blood away from the heart to the rest of the body.

What are veins?

Veins return oxygen-poor blood back to the heart.

True or false: The heart has four chambers.

True, because the heart has two upper atria and two lower ventricles.

Fill in the blank: Blood enters the heart through the _____ and _____ veins.

Blood enters the heart through the superior and inferior vena cavae.

Difference between arteries and veins

Arteries carry blood away from the heart; veins carry blood back to the heart.

What is pulmonary circulation?

Pulmonary circulation is the movement of blood from the heart to the lungs and back.

Role of capillaries

Capillaries are tiny blood vessels where gas exchange occurs between blood and tissues.

What does blood transport?

Blood transports oxygen, nutrients, hormones, and waste products.

True or false: Deoxygenated blood is bright red.

False, because deoxygenated blood is darker, almost bluish in color.

What is the systemic circulation?

Systemic circulation is the pathway of blood from the heart to the body and back.

Name the heart's chambers.

The heart has four chambers: right atrium, right ventricle, left atrium, and left ventricle.

What is the aorta?

The aorta is the largest artery that carries oxygen-rich blood from the heart.

What are heart valves?

Heart valves prevent backflow of blood and ensure it flows in one direction.

Fill in the blank: Blood flows into the right atrium from the _____ veins.

Blood flows into the right atrium from the vena cavae.

How does blood get oxygenated?

Blood gets oxygenated in the lungs during pulmonary circulation.