blood. the different components of blood rbc’s/erythrocytes transports o2 (on hemoglobin)...
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Blood
The different components of blood
RBC’s/ErythrocytesTransports O2 (on hemoglobin)
Transports CO2 (on hemoglobin)
LEUKOCYTE FUNCTION: SEE TALBE 21.3—GREAT FUNCTION SUMMARY
Leukocytes Functions
Lymphocyte
Basophil
Neutrophil
eosinophil
Monocyte
Leukocytes—WBC’s• Granulocytes: have
granules in cytoplasm• Agranulocytes: no
granules in cytoplasm
NeutrophilsFunction• Phagocytize pathogens
– particularly bacteria
Structure/ID• Multilobed (3-5) nucleus• Inconspicuous granules• ~2x size of rbc
EosinophilFunction• Kills/attacks parasites• Phagocytize allergens and antigen antibody complexes
– reduces inflammation and allergic rxns
Structure/ID• ~ 2x size of rbc• Very conspicuous red granules• Bilobed nucleus
BasophilFunction• produces histamine and heparin
– Promote inflamation:
Structure/ID• ~2x size of rbc• Bilobed nuclues• Very conspicuous blue granules
MonocytesFunction• Leaves vessels and then
phagocytizes microorganisms
and debri
Structure/ID• ~ 3x size of RBC/largest WBC• Lobed kidney shaped nucleus• No granules
lymphocyteFunction• Produces antibodies (specific immunity)
Structure/ID• Slightly larger then rbc• Round Nucleus fills most of cell• No granules
Comparing Leukocytes
A
D
CB
PlateletsFunction• Reduce blood loss• Platelet plug/clotting
Stucture/ID• Cell fragments• Small (much smaller then rbc),
darkish
Relative Abundance of Leukocyes
Never Let Monkeys Eat Bananas
»Nuetrophils (most common wbc)
»Lymphocytes
»Monocytes
»Eosinophils»Basophils (least common wbc)
Differential WBC countBecause:• there is a typical amount of each WBC• Each WBC has a different function• WBC respond to their specific challenges
by increasing in number
• Counting the relative abundance of each WBC (differential WBC count) can help assess what a condition/problem is
Normal WBC Frequencies
Blood Cell Normal Value
Neutophil 52-62%
Eosinophil 1-3%
Basophil Less then 1%
Lymphocyte 25-33%
Monocyte 3-9%