Cardiac Anatomy and Physiology Flashcards
What are the four main components of anatomical position?
Head forward
Body standing erect
Arms at side
Palms forward
Anterior is the ____ of the patient
front
Posterior is the ___ of the patient
back
Lateral is the ___ of the pateitn
side
Superior is towards the ____ of the patient
top
Inferior is towards the ___ of the patient
bottom
Medial is the ______ of the patient
middle
The sagittal plane…….
cuts the patient in half vertically from left to right
The transverse plane….
cuts the patient in half horizontally from top to bottom
The frontal plane….
cuts the patient in half vertically from front to back
The elbow is more ____ to the shoulder than the wrist
proximal
The chin is _____ to the navel
superior
The spine is ____ to the heart
posterior
What is the function of the heart
responsible for vital transport of blood, oxygen, nutrients, and byproducts to and from tissues
What does the thoracic cavity contain
the heart and lungs
What muscle is inferior to the heart
the diaphragm
What are the components of the thoracic wall
vertebrae, ribs, sternum, and clavicle
What is the membranous sac that contains the heart
the pericardium
Where is the diaphragm located
below the heart and lungs
The diaphragm divides the _____ and _____ cavities
thoracic and abdominal
The diaphragm is innervated by the
phrenic nerve
What is the function of the diaphragm
to control breathing
contracting when exhaling
expanding when inhaling
What is the function of the phrenic nerve
to innervate the diaphragm
The apex of the heart is located
directed downward, forward, and to the left in humans
What is the function of the left atrium
pump oxygenated blood from lungs to left ventricle
What is the function of the left ventricle
pump oxygenated blood from lungs to body
What is the function of the right atrium
returns deoxygenated blood from body to right ventricle
What is the function of the right venticle
pump deoxygenated blood from body (right atrium) to the lungs
What is the function of the arteries
carry blood away from ventricles to rest of body,
What are the primary arteries
pulmonary and aorta
Arteries have ____ and ___ walls
strong, elastic
What is the function of the veins
carry blood back to atria from all parts of the body
What are the major veins
vena cava
Arteries mainly carry
oxygenated blood
Veins mainly carry
deoxygenated blood
The pulmonary valve is between the ____ and the _____
right ventricle and pulmonary artery
The pulmonary valve is ____ during systole and ____ during diastole
open, closed
The aortic valve is between the ______ and the _______
left ventricle and aorta
The aortic valve is ____ during systole and _____ during diastole
open, closed
The mitral valve is between the ______ and the ______
left atrium and left ventricle
The mitral valve is ______ during systole and ______ during diastole
closed, open
The tricuspid valve is between the _____ and the ______
right atrium and right ventricle
The tricuspid valve is ______ during systole and ______ during diastole
closed, open
The _____ and _____ valves carry oxygenated blood
aortic and mitral
The ________ and ________ valves carry deoxygenated blood
pulmonary and triscuspid
What two organs does thoracic cavity house
heart and lungs
What nerve passes over the right atrium and left atrium
phrenic
What is the purpose of the pericardium
keep heart fixed within chest cavity
prevent heart from overstretching and overfilling
lubricates the heart
surrounds and protects heart
Starting from the outside in, the layers of the heart tissue are
fibrous pericardium
parietal pericardium
epicardium
myocardium
endocardium
What are the two names of the semilunar valves?
pulmonary and aortic
What is the endocardium
the thin, smooth membrane which lines the inside of the chambers of the heart and forms the surface of the valves
What is the myocardium
to facilitate the contraction and relaxation of the heart walls in order to receive and pump the blood into the systemic circulation
muscular layer of the heart
What is the epicardium
a serous membrane that forms the innermost layer of the pericardium and the outer surface of the heart.
What is the pericardium
the membrane enclosing the heart, consisting of an outer fibrous layer and an inner double layer of serous membrane.
What are the three circulatory system phases
Heart
Systemic
Pulmonary
What is the systemic circulation
carries oxygenated blood away from heart to body
returns deoxygenated blood to heart
What is the pulmonary circulation
movement of blood from heart to lungs and back to heart
What is the coronary circulation
provides heart with blood that carries oxygen and nutrients needed for cardiac tissues
What is cardiac output
volume of ejected blood by heart in one minute
CO=HRxSV
L/min
What is normal cardiac output
4 to 6 liters per minute
What are the three factors that impact stroke volume
preload
afterload
contractility
What is preload
the amount of stretch on the ventricle at the end of diastole
What is afterload
the amount of resistance the heart must work against during systole
What is afterload
the amount of resistance the heart must work against during systole
What is contractility
the ability of the myocardium to contract and relax
Each ventricle ejects about ______ of its volume per stroke
65%
What is the equation for ejection fraction
SV/EDV