DAT Circulatory System Cheat Sheet Flashcards
How many atria in a chamber
2
how many ventricles in a chamber
2
Connects right
atria/ventricle
tricuspid
Connects left
atria/ventricle
Bicuspid/ Mitral:
Connects right
ventricle to pulmonary artery
pulmonary valve
Connects left ventricle to
aorta
aortic valve
Atrioventricular valves, what are the 2
tricuspid, bicuspid/ mitral
the two semilunar valves
pulmonary and aortic
cardiac cycle is regulated by…
autonomic NS
step 1 of cardiac cycle
Heart is at rest, awaiting
action potential
steps 2-3 of cardiac cycle
Sinoatrial (SA/
pacemaker) node in upper right
atrium initiates contraction of
atria and stimulate
atrioventricular (AV) node
Sinoatrial (SA/
pacemaker) node in upper right
atrium initiates contraction of…
atria
what does contraction of atria stimulate
atrioventricular node
step 4 of cardiac cycle
AV node passes impulse
to Bundle of His between
ventricles
AV node passes impulse to what..
Bundle of His
step 5-6 of cardiac cycle
5-6: Bundle of His passes
signal to Purkinje fibers =
contraction of both ventricles
where does bundle of his pass signal to
purknje fibers
what does the signal received by purknje fibers initiate
contraction of both ventricles
Contraction of atria/
ventricles
systole
Relaxation of atria/
ventricles
diastole
blood types are classified by…
presence of
antigen on erythrocyte
membrane
Antibodies
attack blood cells with
foreign antigens, forming
clumps
Agglutination:
what blood type is the universal recipient because these individuals do not produce antibodies
against any blood type
blood type AB+
universal donor
O-
+/- part of blood type is called…
Rhesus (RH) Factor
antibodies in type A blood
anti B
antibodies in type B
anti A
antibodies in type AB
none
antibodies in type o
anti a and anti b
antigens of type A
a antigen
antigen of type B
b antigen
antigen of type a and b
a and b antigens
antigen of type o
none
Pulmonary Circuit:
Heart (right) -> Lungs -> Heart (left)
Deoxygenated blood enters where via what
right atrium via vena cava
right Atrium contracts and squeezes blood through…
tricuspid valve to right ventricle
Right Ventricle contracts and pumps blood through…
pulmonary semilunar valve to pulmonary
artery.
lowest concentration of oxygen in body
pulmonary artery
Blood is oxygenated in
lungs
what returns blood to left atrium.
pulmonary vein
Pulmonary vein returns blood to…
left atrium
highest concentration of
oxygen in the body
pulmonary vein
Systemic Circuit:
Heart (left) -> Body -> Heart (right)
contracts and pumps blood through bicuspid valve to left ventricle
left atrium
Left atrium contracts and pumps blood through…
bicuspid valve to left ventricle
Contraction of left ventricle sends blood through…
aortic semilunar valve to aorta,
Contraction of WHAT sends blood through aortic semilunar valve to aorta,
LEFT ventricle
sends
blood to arteries for distribution throughout the body
aorta
Oxygenated blood is transported to body tissues via
arteries -> arterioles -> capillaries ->
tissues
Deoxygenated blood is transported back to the heart via
veins
Deoxygenated blood enters the right atrium via
superior and inferior vena cava.
Carry oxygenated blood away from the heart
arteries
Arteries branch into
arterioles
wrapped in smooth muscle and are major
determinants of blood pressure
arterioles
Carry deoxygenated blood towards the heart
veins
small vessels that collect back to veins
venules
Smallest vessels with a single layer of endothelial cells to allow for exchange of gas,
nutrients, and waste with body tissues
capillaries
Regulate passage of blood into capillaries.
precapillary sphincters
Aqueous mix of blood proteins, salts,
gases, and nutrients
plasma
Plasma without clotting proteins
serum
Cell fragments for blood clotting
platlets
Transport oxygen on
hemoglobin
Erythrocytes (RBC):
Phagocytes that
engulf foreign particles
Leukocytes (WBC):
