Chapter 19- Blood Flashcards
% of blood that is plasma
55%
% of blood that are formed elements
45%
composition elements of plasma
water, protein, other solutes
composition of formed elements
platelets, WBCs, RBCs
3 general functions of blood
transportation, regulation, protection
hemopoeisis
hemopoietic stem cells in the red bone marrow that can differentiate into all types of blood cells
erythropoeisis
red blood cell regeneration
average life span of RBC
120 days
average RBC count in females
4.8 million/mm^3
average RBC count in males
5.4 million/mm^3
eosinophil
1-5%, parasitic infection/allergy
basophil
0-1%, release histamine/allergy
neutrophil
60-70%, phagocytes, bacterial infection
monocytes
20-30%, largest WBC, phagocytes, viral infection
lymphocytes
3-8%, smallest WBC, specific immunity