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BLOOD
General info:
• https://www.youtube.com/watch?v=5MOn
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• 3-4 times more viscous than water
• “fluid connective tissue”
• 4 main components
Plasma
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Clear straw colored liquid
55% of blood volume
Mostly water (92%)
Also contains: amino acids, proteins,
carbohydrates, lipids, vitamins, hormones,
electrolytes, cellular wastes
Plasma
• Functions:
– Transports materials (nutrients, gases,
vitamins, hormones, etc)
– Regulates fluid/electrolyte balance
– Regulates pH (buffers)
Erythrocyte (RBC)
• Males: 4.6-6.2 million/ mm3
• Females: 4.2-5.4 million/mm3
• Why red?
– Contains hemoglobin
• No nucleus = no mitosis
– 120 day life span
– Broken down by liver
• Biconcave disc
– More SA for gas transport and flexibility
RBC shape
Hemoglobin
• Found just inside cell membrane
• Contains iron = red color
• Binds to O2, CO2, and CO
• Oxyhemoglobin = bright red
• Deoxyhemoglobin = dark red
Leukocyte (WBC)
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Protect against invaders
Many types
About twice the size of RBC
5000-10,000/mm3
Thrombocytes (Platelets)
• Initiates blood clot formation
• Half the size of RBC
• 130,000-360,000 / mm3