Explore the Body Systems

What is the main function of the circulatory system?

• To filter waste from the blood.

• To produce hormones for growth.

• To regulate body temperature.

• To transport blood and essential substances throughout the body.

Name one major bone in the human skeleton.

• humerus

• tibia

• femur

• skull

What type of joint allows for rotation, like the neck?

• Hinge joint

• Saddle joint

• Ball-and-socket joint

• Pivot joint

What is one function of cartilage in the body?

• Cartilage is responsible for transmitting nerve signals.

• Cartilage helps in the production of red blood cells.

• Cartilage stores fat for energy reserves.

• Cartilage acts as a cushion between bones in joints.

Describe the pathway of blood flow from the heart to the lungs.

• Blood flows from the left ventricle to the aorta, then to the body.

• Blood flows from the right ventricle to the pulmonary arteries, then to the lungs, and returns via the pulmonary veins.

• Blood flows from the right atrium to the left ventricle, then to the lungs.

• Blood flows from the lungs to the right ventricle via the pulmonary arteries.

How does exercise impact the circulatory system?

• Exercise has no effect on blood pressure.

• Exercise weakens the heart muscle.

• Exercise decreases heart rate and blood flow.

• Exercise improves heart function and blood circulation.

What is the largest bone in the human body?

• humerus

• radius

• femur

• tibia

What type of joint is found in the knee?

• Saddle joint

• Ball-and-socket joint

• Pivot joint

• Hinge joint

What role does cartilage play in joints?

• Cartilage serves as a primary structural component of bones.

• Cartilage helps in the production of synovial fluid.

• Cartilage acts as a cushion and reduces friction in joints.

• Cartilage connects muscles to bones in joints.

Explain how blood returns to the heart after circulating through the body.

• Blood returns to the heart through veins, specifically the superior and inferior vena cavae.

• Oxygenated blood returns via the pulmonary veins.

• Blood is pumped back to the heart by the kidneys.

• Blood returns to the heart through arteries.