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BLOOD General info: • https://www.youtube.com/watch?v=5MOn 8X-tyFw • 3-4 times more viscous than water • “fluid connective tissue” • 4 main components Plasma • • • • 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) • • • • 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
