B2 the heart Flashcards
What is the main function of the circulatory system?
To transport blood, nutrients, oxygen, carbon dioxide, and hormones throughout the body.
True or False: The heart is a muscular organ that pumps blood.
True
What are the four main chambers of the heart?
Left atrium, right atrium, left ventricle, right ventricle.
Fill in the blank: The __________ carries oxygenated blood away from the heart.
aorta
What is the role of the right atrium?
To receive deoxygenated blood from the body through the vena cavae.
What type of blood does the left ventricle pump?
Oxygenated blood.
What is the function of valves in the heart?
To prevent the backflow of blood.
Which blood vessel carries deoxygenated blood to the heart?
Vena cava.
Multiple choice: Which chamber of the heart is responsible for pumping blood to the lungs?
Right ventricle
What is the name of the cycle that describes the heart’s pumping action?
Cardiac cycle.
True or False: The heart has its own blood supply via the coronary arteries.
True
Fill in the blank: The __________ is the wall that separates the left and right sides of the heart.
septum
What is the purpose of the pulmonary circulation?
To carry deoxygenated blood from the heart to the lungs and back.
What is the term for the contraction phase of the heart?
Systole.
What is the term for the relaxation phase of the heart?
Diastole.
Multiple choice: Which part of the heart receives oxygenated blood from the lungs?
Left atrium
What is the function of the aorta?
To distribute oxygenated blood from the heart to the rest of the body.
True or False: The heart is located in the left side of the chest.
True
What is the name of the heart’s pacemaker?
Sinoatrial (SA) node.
Fill in the blank: Blood enters the left atrium from the __________.
pulmonary veins
What type of blood do the pulmonary arteries carry?
Deoxygenated blood.
Multiple choice: Which valve is located between the left atrium and left ventricle?
Mitral valve
What is the main role of the coronary arteries?
To supply blood to the heart muscle.
What is the effect of exercise on the heart rate?
It increases the heart rate.
True or False: The heart can function without external nerve signals.
True
What is the average resting heart rate for an adult?
60 to 100 beats per minute.
