Circulatory System and Heart Function

These flashcards cover key concepts related to the circulatory system and the heart's function.

What are the two main parts of the circulatory system?

The cardiovascular system and the lymphatic system.

What separates the two sides of the heart?

The septum.

How many chambers are there in the human heart?

Four chambers: left atrium, right atrium, left ventricle, right ventricle.

What type of blood enters the right atrium?

Deoxygenated blood.

What is the function of capillaries in the circulatory system?

Gas, nutrient, and waste exchange happens using capillaries.

What sound does the heart make when the AV valves close?

LUB.

What is the role of the aorta in the circulatory system?

It transports oxygenated blood to the entire body.

What happens during cardiac diastole?

All chambers are relaxed, and blood flows into the heart.

What do veins carry towards the heart?

Deoxygenated blood.

What is the purpose of valves in the heart?

They open and close to ensure one-way blood flow.

What is the difference between arteries and veins?

Arteries carry oxygenated blood away from the heart; veins carry deoxygenated blood to the heart.

What is the largest vein in the body?

The vena cava.

Where does oxygenation of blood occur?

In the lungs.

What is represented by the term 'systole'?

The phase of the heartbeat when the heart muscles contract.

What structure pumps blood to the body from the left ventricle?

The aorta.

What function do red blood cells serve in the circulatory system?

Transporting oxygen to body cells and carbon dioxide away from them.