Concept 5.2 Lecture Video and Quiz

What is the primary function of the cardiovascular system?

• To control body temperature

• To transport oxygen and nutrients to cells and remove waste

• To produce hormones

• To digest food

Which major structures are part of the cardiovascular system?

• Brain, spinal cord, and nerves

• Lungs, liver, and kidneys

• Stomach, intestines, and pancreas

• Heart, blood, and blood vessels

What type of tissue is the heart primarily made of?

• Smooth muscle tissue

• Connective tissue

• Skeletal muscle tissue

• Cardiac muscle tissue

What is a unique feature of cardiac muscle cells?

• They lack mitochondria

• They do not contract

• They are longer than skeletal muscle cells

• They are interconnected with gap junctions

What is the role of pacemaker cells in the heart?

• To produce hormones

• To store oxygen

• To contract and pump blood

• To generate electrical impulses without neural input

Which side of the heart handles oxygen-poor blood?

• Right side

• Left side

• Both sides

• Neither side

What is the function of the interventricular septum?

• To divide the heart into two sides

• To pump blood

• To store oxygen

• To produce hormones

What is the role of the atrioventricular (AV) valves?

• To produce hormones

• To store oxygen

• To pump blood

• To prevent backflow into the atria

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

• Veins

• Arteries

• Venules

• Capillaries

What is the primary function of capillaries?

• To transfer blood between veins and arteries

• To store oxygen

• To pump blood

• To produce hormones