Heart Flashcards
INTERCALAED DISCS
BRANCHED
SELF PACED
EPINEPHRINE CONTROLLED
Hear Muscle Tissue
NUCLEI PUSHED TO EDGE
VOLUNTARY
MOVES SKELETON
ACETYLCHOLINE CONTROLLED
Skeletal Tissue
(INTERNAL ORGANS & VESSELS
ALMOND SHAPED
INVOLUNTARY
PARASYMPATHETIC ACETYLCHOLINE
CONTROLED
SMOOTH MUSCLE
a double-walled sac around the heart
composed of a superficial fibrous pericardium.
Pericardium
(peri means around, cardiac mean heart)
visceral
layer of the serous
pericardium
Epicardium
cardiac
muscle layer forming the bulk of the heart
Myocardium
crisscrossing,
interlacing layer of
connective tissue
Fibrous skeleton of the
heart
endothelial layer of the
inner myocardial surface
Endocardium
(inside)
Blood enters right atria from ______
superior
and inferior venae cavae and
coronary sinus
Blood enters left atria____
from
pulmonary veins
What is the functional blood supply to the heart muscle itself
Coronary circulation
What ensure blood delivery to heart even if major vessels are occluded
Collateral routes
what ensure
unidirectional blood flow through the heart
Heart valves
- Aortic semilunar valve lies between the left ventricle and the aorta
- Pulmonary semilunar valve lies between the right ventricle and pulmonary
trunk - Semilunar valves prevent backflow of blood into the ventricle
Heart Valves
contraction of heart muscle top number of bp
Systole
relaxation of heart muscle bottom number of bp
Diastole
early diastole, Ventricles relax, Backflow of blood in
aorta and pulmonary
trunk closes semilunar
valves
Isovolumetric relaxation
brief rise in
aortic pressure caused by
backflow of blood
rebounding off semilunar
valves
Dicrotic notch
What is the amount of blood pumped by each ventricle in one minute and the product of heart rate (HR) + stroke volume (SV)
Cardiac Output (CO)
What is the number of heart beats per minute
HR (Reverse)
What is the amount of blood pumped out by a ventricle with each beat
SV
What is the difference between resting and maximal CO
Cardiac reverse
