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19 Cards in this Set

  • Front
  • Back

Blood Functions

1. Transport


2. Regulation


3. Defense

Whole blood is made out of.....

Plasma - water and dissolved plasma proteins


Formed Elements - RBC's, WBC's, Platelets


Plasma Proteins

1. Albumnin 60%


2. Globulins 35%


3.Fibrinogen 4%

Hemoglobin

Red pigment that gives blood its color. Binds and transports oxygen and CO2


RBC counts

Male - 4.5-6.3 million


Female - 4.2-5.5 million

Blood Types

A - surface antigen A


B - surface antigen B


AB - surface antigen A&B


O - Neither A or B


Types of WBC's

1. Neutrophils


2. Eosinophils


3. Basophils


4. Monocytes


5. Lymphocytes



Hemostasis


(cessation of bleeding)

1. Vascular phase


2.Platelet phase


3. Coagulation phase

Vascular Phase

-Stimulate smooth muscle contraction


-plasma membranes become sticky to platelets

Platelet Phase

-platelet adhesion sticks to basement membranes


-Form platelet plug


Coagulation phase


(3 pathways)

1.Extrinsic pathway


2. Intrinsic pathway


3. Common pathway


Extrinsic Pathway

-happens outside bloodstream


-Damaged cells release TF (tissue factor)


-activates factor X

Intrinsic pathway

-happens within bloodstream


-activates collagen


-activates factor X

Common Pathway

-extrinsic and intrinsic pathways converge


-converts prothrombin to thrombin


-converts fibrinogen to fibrin


-

Neutrophils

-50-70%


-Very active


-phagocytic

Eosinophils

-2-4%


-attack large parasites


-sensitive to allergens


-control inflammation


-excrete toxic compounds

Basophils

-less than 1%


-Accumulate in damages tissue


-release histamine and heparin


Monocytes

-2-8%


-Large, become macrophages

Lymphocytes

-20-30%


-Larger than RBC's


-immunity cells (T-cells, B-cells, NK cells)