pg 6 Flashcards
(17 cards)
What are the two circuits blood flows through in the circulatory system?
- Pulmonary circuit
- Systemic circuit
The pulmonary circuit oxygenates blood in the lungs, while the systemic circuit distributes oxygenated blood to the rest of the body.
What is the function of arteries in the pulmonary circuit?
Carry deoxygenated blood to the lungs
Arteries are responsible for transporting blood away from the heart.
What is the function of veins in the pulmonary circuit?
Carry oxygenated blood back to the heart
Veins return blood to the heart after it has been oxygenated in the lungs.
What is the function of arteries in the systemic circuit?
Carry oxygenated blood to the body
This is crucial for supplying oxygen and nutrients to tissues.
What is the function of veins in the systemic circuit?
Carry deoxygenated blood back to the heart
Veins help return blood that has delivered oxygen to the tissues.
What divides the left and right sides of the heart?
The septum
The septum is a muscular wall that separates the two sides of the heart.
How many chambers are in each side of the heart?
Two chambers
Each side consists of an atrium and a ventricle.
Which ventricle is larger, the right or left, and why?
The left ventricle is larger because it pumps blood to the rest of the body
The right ventricle only pumps blood to the lungs.
What are the valves between the atria and ventricles called?
Atrioventricular valves
These valves prevent backflow of blood between the heart chambers.
What supports the atrioventricular valves?
Chordae tendinae
These fibrous strings prevent the valves from inverting.
What is the purpose of semilunar valves?
They control blood flow out of the heart
The right ventricle has a pulmonary semilunar valve, and the left has an aortic semilunar valve.
Why do semilunar valves not have chordae tendinae?
They do not require support from chordae tendinae
Semilunar valves are designed to handle the pressure of blood flow without inversion.
What is the function of the pulmonary semilunar valve?
Controls blood flow from the right ventricle to the pulmonary artery
It ensures that blood moves toward the lungs for oxygenation.
What is the function of the aortic semilunar valve?
Controls blood flow from the left ventricle to the aorta
This valve allows oxygenated blood to enter the systemic circulation.
Fill in the blank: The _______ is a muscular wall that separates the two sides of the heart.
septum
The septum is crucial for maintaining separate circulation in the heart.
True or False: The right ventricle pumps blood to the entire body.
False
The right ventricle only pumps blood to the lungs.
True or False: The left ventricle is smaller than the right ventricle.
False
The left ventricle is larger due to its role in systemic circulation.
