Cardiovascular system Flashcards
(20 cards)
other names for monocytes
macrophages
Which cells release platelets/thrombocytes
Megakaryocytes in the bone marrow
hematopoiesis
Production of blood cells and platelets
erythropoietin
triggers the production of rbc
Secreted by the kidney
thrombopoietin
Triggers the production of platelets
Secreted by the liver
Antigen
Any specific protein on the surface of a cell to which immune system can react
Universal donors
O
Can give blood to anyone
Universal recipients
AB
can take blood from anyone
sphygmomanometer
Measure the gage pressure in the systemic circulation
which is the pressure above and beyond the atmospheric pressure
Pressure difference equation for circulation
Pressure differential across circulation = cardiac output x total peripheral (vascular) resistance
Explain the difference between fetal and maternal hemoglobin
Fetal hemoglobin has higher affinity for oxygen than adult hemoglobin
Hydrostatic pressure
Force per unit area that the blood exerts against the vessel walls
Generated by the contraction of the heart and elasticity of the arteries
measured upstream in the large arteries as blood pressure
What does hydrostatic pressure do?
Pushes fluid out of the bloodstream into the interstitial through the capillary walls
Osmotic pressure
oncotic pressure (other name)
Sucking pressure by the solutes as they try to get water into the bloodstream
What is the pressure at the arteriole end of the capillary bed
Hydrostatic pressure (pushing fluid out) is much larger than osmotic pressure (pulling fluid in)
more water leaving blood and entering tissues
What is the pressure at the venule end of the capillary bed
hydrostatic pressure dropped
osmotic pressure is more
thoracic duct
Channel that returns lymph to the central circulatory system
What is exposed to trigger blood clots?
Endothelial tissues under the skin
What happens when platelets come to the side of wound?
They bind to collagen and fibrin stabilizes them
this is activated by thrombin
What brakes clots?
Plasmin
