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BrittanyPerezBlood.pdf (functions (maintains body temp, transports…
BrittanyPerezBlood.pdf
composed of
formed elements
erythrocytes
leukocytes
thrombocytes
formed elements account for 45% of whole blood; they arise from hemocytoblasts in red bone marrow
plasma
albumin
globulins
clotting proteins
plasma is a straw colored viscous fluid; makes up 55% of whole blood
normal blood counts
women: 4.7 million
men: 5.2 million
vessel wall breakage can cause
hemostasis
(the stopping of blood flow)
vascular spasms
Step 1: blood vessels constrict to allow less blood loss
platelet plug formation
2nd step: platelets stick together to form temp seal to cover break in vessel wall
coagulation (blood clotting)
Third step: most effective defense against bleeding
formation of WBC's
leukopoiesis
formation of RBC's
erythropoiesis
is produced
in bone marrow
functions
maintains body temp
transports hormones
removes metabolic waste
delivers oxygen and nutrients to body tissue
formation of thrombocytes
thrombopoiesis