Wk 2 Flashcards
CVS introduction (10 cards)
What is pulmonary and systemic circulation- what side do they get pumped to
P;taking deoxygenated blood to the lungs to replenish O2 and pumped into right ventricle
s;taking oxygenated blood to tissues to give O2 in the blood and removes CO2
right heart pumps blood pulmonary circ to left and
left heart pumps blood sys circ right heart
what is mammalian circulation
is also called dual circulation- the right heart pumps blood into a separate group of arteries and veins
- since left heart pumps oxygenated blood
where is the heart located
middle of the inferior mediastinum
What is the pericardium
The heart is surrounded in this and has 2 coats-
fibrous; tough layer to protect heart and anchors
serous: thin layer
visceral- lines outer surface of heart
parietal: outer layer lining undersurface of fibrous pericardium
inbetween is pericardial fluid
what way does the blood flow through the heart
right atrium- right ventricle- left atrium- left ventricle
details of the cardiac muscle
has low anaerobic capacity, high resting O2 consumption, high capillary density,
high O2 extraction,
O2 delivery to cardiac muscle is dependent on coronary blood flow
details of skeletal muscle
high anaerobic capacity, lower resting O2 capacity
lower capillary density
lower O2 extraction fraction
O2 delivery dependent on skeletal muscle blood flow
how does the coronary artery divide
left coronary artery divide into circumflex and anterior interventricular artery
right coronary divides into right marginal artery and posterior interventricular
What are the veins on the anterior surface of the heart
great cardiac veins; rises on anterior interventricular a. and curve w/ posterior interventricular a
middle cardiac vein travels w/ posterior interventricular a
what are the veins on the posterior surface of the heart
small cardiac vein; drains blood from right side of heart
then trains into coronary sinus on right atrium
anterior cardiac vein; drains into right atrium
