Lecture 12 Part 1 Flashcards
Circultry. sytm. functions:
transpts. gases, adjusts to chngs. in press. , contr. to thermoregulatn.
Circtry. sytm. : Transpts. dig. end products and
hormones, waste products, cells/chemicals
Unique to mamm: Erythrocytes lack nuclei-more..
hemogoblin
biconcave; better diffusion
Cardiovasc. systm includes
Blood, Arteries/Arterioles, Veins/Venules, Capillaries
Blood consists of
Plasma, Erythrocytes, Leukocytes, Platelets (thrombocytes)
Platelets (thrombocyt.)-
Pieces of cells;
Aid in clotting
Leukocytes (WBC)-
RBC>WBC; short lifespan
Erythrocytes: RBC-lack nuclei only in..
mamm.; three to four lifespan in humans
Plasma: Liquid portion, clear/yellw color-
carries blood cells, nutr. and wastes
Arteries/Arterioles-carry blood away from heart. Usually carries…
blood high in oxygen from heart to organs
Veins/Venules-carry blood toward heart. Usually carries…
low in oxygen from body back to heart
Capillaries between…
arteries/veins
Basic Vert. Heart (4) chambers-
Sinus venosus, Atrium, Ventricle, Conus/Bulbus arteriosus
Low Blood Press.-Veins: One way…
valves in veins prevent backflow
Musc. squze veins to maint. press.
Circultn. Pattrns are
single and double
