Functions of the Cardiovascular System

The video explains the cardiovascular system, focusing on the heart and blood vessels. It describes the heart's structure, including atria and ventricles, and how blood flows through these chambers. The heart's electrical system, which controls muscle contraction, is also covered, along with arrhythmias. The video details the roles of arteries, capillaries, and veins in blood circulation, highlighting their structural differences and functions.

What is the primary function of the cardiovascular system?

• To deliver oxygen and nutrients to the body

• To produce hormones

• To digest food

• To store energy

Which part of the heart is responsible for pumping blood to the lungs?

• Right ventricle

• Left atrium

• Right atrium

• Left ventricle

What regulates the flow of blood through the heart chambers?

• Heart valves

• Blood vessels

• Nerve signals

• Muscle contractions

Where does the electrical impulse that controls heart contraction originate?

• Sinoatrial node

• Bundle of His

• Purkinje fibers

• Atrioventricular node

What is an arrhythmia?

• A heart valve disorder

• A type of blood vessel

• An irregular heartbeat

• A lung condition

Which type of blood vessel carries blood away from the heart?

• Veins

• Capillaries

• Arteries

• Venules

What is the function of capillaries in the circulatory system?

• To pump blood

• To store blood

• To filter blood

• To allow exchange between blood and tissues