Understanding Heart Structure and Function

What is the primary function of the heart in the circulatory system?

• To produce blood cells

• To pump blood throughout the body

• To filter waste from the blood

• To store oxygen

Which of the following best describes the difference between the atria and the ventricles?

• Atria are larger than ventricles

• Atria receive blood, while ventricles pump blood out

• Atria pump blood to the lungs, while ventricles pump blood to the body

• Atria are responsible for oxygenating blood, while ventricles are not

Label the chambers of the heart.

a

b

c

d

Left Atrium

Left ventricle

Lungs

Right Atrium

Right ventricle

Trace the path of blood flow starting from the right atrium. Which of the following is the correct sequence?

• Right atrium → Right ventricle → Lungs → Left atrium → Left ventricle

• Right atrium → Left ventricle → Lungs → Right ventricle → Left atrium

• Right atrium → Lungs → Right ventricle → Left atrium → Left ventricle

• Right atrium → Left atrium → Right ventricle → Lungs → Left ventricle

Organize parts of the circulatory system by the kind of blood they carry

Groups:

(a) Blue Deoxygenated Blood

,

(b) Red Oxygen Rich Blood

• Left Atrium

• Most Arteries

• Most Veins

• Pulmonary Artery

• Right Ventricle

• Aorta

• Vena Cava

• Left Ventricle

• Right Atrium

• Pulmonary Vein

What role do the heart valves play in blood circulation?

• They oxygenate the blood

• They prevent the backflow of blood

• They increase the speed of blood flow

• They filter impurities from the blood

Which type of blood is carried by the pulmonary veins?

• Deoxygenated blood

• Oxygenated blood

• Mixed blood

• Carbonated blood

Identify the chamber of the heart that receives deoxygenated blood from the body.

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

Which valve is located between the left atrium and the left ventricle?

• Tricuspid valve

• Pulmonary valve

• Bicuspid valve

• Aortic valve

What happens to blood as it passes through the lungs?

• It becomes deoxygenated

• It releases carbon dioxide and picks up oxygen

• It becomes thicker

• It loses nutrients

Tags

NGSS.HS-LS2-3