Exploring the Circulatory System and Heart Function

What is the primary function of the circulatory system?

• To transport gases only

• To provide structural support to the body

• To transport nutrients, gases, and wastes

• To control body temperature

Where is the human heart typically located?

• Right side of the chest

• Center of the chest

• Slightly to the left of the middle chest

• Directly above the stomach

What type of muscle is the heart classified as?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

• Elastic muscle

Which chambers of the heart receive blood from the body and lungs?

• Septum

• Valves

• Atria

• Ventricles

What is the main function of arteries?

• To produce blood cells

• To carry blood to the heart

• To filter blood

• To carry blood away from the heart

How does the body utilize the oxygen transported by the blood?

• To create waste

• To digest food

• To extract energy from nutrients

• To build muscle

What role do the heart valves play?

• They prevent the backward flow of blood

• They absorb nutrients

• They filter blood

• They pump blood

How long can the heart beat outside the body if it has enough energy?

• It cannot beat outside the body

• Indefinitely

• For several minutes

• For a few seconds

Approximately how long are all the blood vessels in an adult human?

• Around 50,000 kilometers

• Around 10,000 kilometers

• Around 100,000 kilometers

• Around 1,000 kilometers

What percentage of the circulatory system's length do capillaries make up?

• About 70%

• About 60%

• About 80%

• About 50%