Understanding Heartbeat

What is the primary function of a heartbeat in the human body?

• To control breathing

• To regulate body temperature

• To circulate blood throughout the body

• To aid in digestion

Which part of the heart is responsible for initiating the heartbeat?

• The aorta

• The sinoatrial node

• The atria

• The ventricles

What role does the sinoatrial node play in the heartbeat?

• It pumps blood to the lungs

• It acts as the heart's natural pacemaker

• It controls the heart valves

• It filters blood

Which of the following can affect the rate of heartbeat?

• Neither diet nor exercise

• Both diet and exercise

• Exercise

• Diet

Why is it important to monitor changes in heartbeat?

• To assess heart health and detect potential issues

• To enhance vision

• To predict weather changes

• To improve memory