Blood Web - Blood only fluid tissue of body What type of...

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Blood – only fluid tissue of body Functions include, among others: Nutrient and waste management Heat management Body defenses What type of tissue is blood? Epithelial Connective Muscle Nerve
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Physical Characteristics of Blood Color range Oxygen-rich = scarlet red Oxygen-poor = dull red pH = 7.35–7.45 (slightly alkaline) Blood temperature = 100.4°F (slightly higher than body temp) 5 - 6 quarts per healthy adult 8% of body weight
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Figure 10.1 (1 of 2) Blood has 2 major components: Formed elements = living cells (40-50%) Plasma = non-living matrix (50-60%)
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Blood Plasma is mostly (90%) water and… Over 100 dissolved substances! Nutrients (like glucose) Salts (electrolytes) Respiratory gases (O 2 and CO 2 ) Hormones Plasma proteins Waste products (urea, for eg.)
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Plasma proteins = most abundant plasma solutes Most made by liver Plasma proteins include Albumin— regulates osmotic pressure Clotting proteins— help stop blood loss Antibodies— made by white blood cells, help identify pathogens Plasma proteins usually remain in the blood, i.e. not taken up by cells
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Blood Plasma changes continuously, but must stay within critical bounds for homeostasis Cells constantly take nutrients, add waste Organs adjust constantly to maintain balance For example, pH (7.35-7.45) of blood is critical (below 6.8 or above 7.8 - ‘not compatible with life’) Acidosis = blood too acidic Alkalosis = blood too basic Respiratory system and kidneys restore pH in both cases
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Formed Elements Erythrocytes – red blood cells (RBCs), most abundant Leukocytes - White blood cells (WBCs), many different types Platelets – cell fragments, for blood clotting
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carry O 2 (some CO 2 ) Anatomy of mature erythrocytes: Flexible biconcave disks full of hemoglobin Anucleate (no nucleus) and no mitochondria (ATP generation is anaerobic) 5 million RBCs per mm 3 of blood! How does anaerobic
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This note was uploaded on 01/13/2012 for the course ANATOMY 10 taught by Professor Prestongalusky during the Fall '11 term at Riverside Community College.

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Blood Web - Blood only fluid tissue of body What type of...

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