Blood: Functions and Components

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Part 1

Function of blood

~~TRANSPORTATION~~
Gases, Nutrients, Hormones, Wastes, Heat, Ions, Immune system components

Components of blood

55% is Blood Plasma
45% is formed elements

Components of plasma (55%)

Proteins=7% of plasma.
Water=91.5% of plasma

Formed Elements (45%)

Platelets - 150-400,000
WBC - 5-10,000
RBC - 4-5.5 million

Formation of blood

Made in Red bone marrow, live only a few days-months, RBC stays at a certain level: regulated by neg feedback, WBC naturally fluxuate and respond to pathogens or antigens(proteins) and respond to infection.

Erythrocytes(RBC)

Hemoglobin(a protien) transports ox and co2 and live @4months. Damaged RBC's are destroyed by liver and spleen. 2mil produced/second
(a rbc is a bag of hemoglobin)

RBC Count

4.4-5 million/micro liter

Hematocrit

%of blood volume
Males: 40-54%
Females:38-46%

Polycythemia

High RBC count and increased viscosity or thickness

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