Cardiovascular System Flashcards
What are the layers of the heart?
- Epicardium
- Myocardium
- Endocardium
What is the bulk layer called?
The myocardium
What does the lining of the blood vessels consist of?
Endocardium
How many pulmonary veins are there? Where do they transport blood?
- 4 veins
- left atrium
The right atrium receives blood from (blank.)
- superior/inferior vena cava
- coronary sinus
The left atrium receives blood from (blank.)
- the pulmonary veins
The right ventricle pumps blood into?
pulmonary trunk
The left ventricle pumps blood into?
aorta
What are papillary muscles responsible for?
Keeping the valve flap in a closed position
What do SL valves do? What is the medical term?
- prevent backflow into ventricles in repolarization
- semilunar valve
What are the two semilunar valves?
- aortic semilunar valve
- pulmonary semilunar valve
What is the pathway of blood through the heart?
Cycle: SVC/IVC —> Right Atrium —> Tricuspid Valve —> Right Ventricle —> Pulmonary Semilunar Valve —> Pulmonary Trunk —> Lungs —> Heart —> Pulmonary veins —> Left Atrium —> Bicuspid Valve —> Left Ventricle —> Aortic Semilunar Valve —> Aorta —> Body
How does the heart tissue receive blood?
Coronary circulation
How much bloody supply does the heart require?
1/20th of the blood in the body
When is the blood delivered to the heart tissue?
When the heart is releaxed.