Circulatory System Overview 2

What organ pushes blood through your body?

The heart pushes blood through the circulatory system.

How many chambers does the heart have?

The heart has 4 chambers:

Right Atrium

Right Ventricle

Left Atrium

Left Ventricle

What are heart valves and what do they do?

Heart valves are structures that open and close to control the flow of blood through the heart, ensuring it flows in the correct direction.

What causes the “lub” and “dub” sounds of the heartbeat?

The “lub” sound is caused by the atrioventricular valves closing.

The “dub” sound is caused by the semilunar valves closing.

What is the flow of blood through the heart, starting from the right atrium?

Right Atrium → Right Ventricle → Pulmonary Arteries → Lungs → Pulmonary Veins → Left Atrium → Left Ventricle → Aorta → Rest of the Body

Where does blood from the right ventricle go?

Blood from the right ventricle goes to the pulmonary arteries and is pumped to the lungs.

Where does blood from the left ventricle go?

Blood from the left ventricle is pumped to the aorta, which distributes it to the rest of the body.

What happens to blood in the lungs?

In the lungs, blood is oxygenated and carbon dioxide is removed.

What are the three types of blood vessels, and what do they do?

Arteries: Carry oxygen-rich blood away from the heart.

Veins: Carry oxygen-poor blood back to the heart.

Capillaries: Where oxygen is released into cells and carbon dioxide is absorbed.

What is the difference between the blood in the pulmonary arteries and other arteries?

The blood in the pulmonary arteries is oxygen-poor.

What is the difference between the blood in the pulmonary veins and other veins?

The blood in the pulmonary veins is oxygen-rich.

What is found in blood?

Red blood cells: Carry oxygen.

White blood cells: Fight disease.

Platelets: Help stop bleeding.

Plasma: Carries oxygen, nutrients, carbon dioxide, and urea.

Where does sugar enter the blood, and where is it removed?

Enters: The small intestine after digestion.

Removed: By cells for energy or stored in the liver.

Where does urea enter the blood, and where is it removed?

Enters: From the cells after metabolism of proteins.

Removed: By the kidneys, which filter it out.