Parts of the Heart
What is the largest artery in the body?
Aorta
What do arteries do?
Carry oxygen-rich blood away from the heart.
What organ pumps blood throughout the body?
Heart
What is the only place where cardiac muscle is found?
The heart.
What is an example of an involuntary muscle?
The heart (cardiac muscle) or smooth muscles in the stomach and intestines.
What do the ventricles do?
Pump blood (Right: to lungs, Left: to body)
What do veins do?
Carry oxygen-poor blood back to the heart.
How many miles of blood vessels are in the human body?
60,000 miles.
What type of muscle helps food move through the digestive system?
Smooth muscle
What does "striated" mean in muscles?
Striped appearance of skeletal & cardiac muscles.
What is the function of the heart’s valves?
Control blood flow and prevent it from flowing backwards.
What is the largest vein in the body?
Vena cava
What type of blood do veins carry?
Oxygen-poor blood.
Are skeletal muscles voluntary or involuntary?
Voluntary (you control them)
What are involuntary muscles?
Muscles that work automatically (like the heart)
What does the right atrium do?
Receives oxygen-poor blood from the body.
What do capillaries do?
Exchange oxygen and nutrients with body cells.
What type of blood do arteries carry?
Oxygen-rich blood.
What are the 3 types of muscles?
Skeletal, smooth, cardiac
What is the definition of a muscle?
An organ made of tissue that contracts and relaxes to create movement.
What does the left atrium do?
Receives oxygen-rich blood from the lungs.
How do capillaries connect to arteries and veins?
They form tiny networks that link them together.
Why is the circulatory system important?
It delivers oxygen and nutrients to cells while removing waste.
What is a muscle contraction?
When a muscle shortens and thickens to create movement.
What are voluntary muscles?
Muscles you can control (like arm muscles).