Cardiovascular system

What is the primary goal mentioned for the red blood cells (erythrocyte) in the journey described?

• To provide nutrients to the body tissues

• To provide oxygen to the body tissues and remove CO₂

• To transport hormones throughout the body

• To fight off infections in the bloodstream

Which molecule is described as tagging along with the red blood cells (erythrocyte) for part of the journey?

• N₂

• CO₂

• O₂

• H₂O

Which molecule is indicated as being toxic and something the red blood cells (erythrocyte) wants to get rid of during the journey?

• O₂

• CO

• CO₂

• N₂O

What is the function of the superior vena cava?

• It carries oxygenated blood to the heart from the lower parts of the body.

• It carries deoxygenated blood to the heart from the parts of the body above the heart.

• It pumps oxygenated blood into the right atrium of the heart.

• It carries nutrients to the heart from the upper parts of the body.

Where does the inferior vena cava carry deoxygenated blood from?

• From parts of the body above the heart.

• From the heart to the lungs.

• From parts of the body below the heart.

• From the lungs to the heart.

Into which part of the heart do the superior and inferior vena cava dump deoxygenated blood?

• Left atrium

• Right ventricle

• Left ventricle

• Right atrium

Why is the tricuspid valve named so?

• Because it is triangular

• Because it has 2 flaps

• Because it has 3 flaps

• Because it is the third valve

When does the tricuspid valve open?

• When the left atrium contracts

• When the right atrium contracts

• When the left ventricle contracts

• When the right ventricle contracts

Where does the blood go after passing through the tricuspid valve?

• From the right ventricle to the right atrium

• From the left atrium to the left ventricle

• From the right atrium to the left ventricle

• From the right atrium to the right ventricle

What is the function of the right ventricle in the heart?

• It pumps oxygenated blood to the lungs.

• It pumps deoxygenated blood to the lungs.

• It receives oxygenated blood from the lungs.

• It receives deoxygenated blood from the body.