Heart Flashcards
How much does your heart weigh?
< 1 lb
What is the size of your heart?
Size of your fist
What is the shape of your heart?
Cone-shaped
What are your lungs medial to?
Lungs
What is your heart enclosed by?
A double sac (pericardium)
What does the apex rest on?
Diaphragm
Which way does the apex point?
Left
How many layers is the heart composed of?
3
What is the epicardium?
Outer protective layer of the heart
What is the myocardium?
Cardiac muscle, middle layer, thickest layer of heart
What is the endocardium?
Inside layer that lines the chambers and is continuous with the inside of the vessels
How many chambers does the heart have?
4
What are the 2 upper chambers of the heart called?
Atria
Are the atria receiving or discharging chambers?
Receiving
What are the 2 lower heart chambers called?
Ventricles
Are the ventricles receiving or discharging chambers?
Discharging
What happens when the ventricles contract?
Blood is propelled out of the heart to the lungs and body systems
What separates the ventricles?
Septum
What does the heart function as?
A double pump
The right side of the heart pumps blood to?
The lungs
What is the pulmonary circuit?
The right side of the heart pumping to the lungs
Left side of the heart pumps to?
Other body systems
What is the systemic circuit?
The left side of the heart pumping blood to the other body systems
Both ventricles pump to?
Two different places but pump at the same time
