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8) Blood - Tissues Blood Blood Vessels Tissues Tissues...

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Tissues: Blood & Blood Vessels
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Tissues Tissues: Epithelia Connective Tissue Muscle Nerve Blood
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Blood Functions - transport -gases (O 2 , CO 2 ) -nutrients -cells (leukocytes) -hormones - homeostasis (aka regulation) -temperature -fluid content -pH -salt - wound healing -clot formation -remodeling (scar)
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-blood is a tissue -fluid = plasma -formed elements = cells Plasma -aqueous solution -exchange -interstitial (tissue) fluid -intracellular fluid -proteins -osmotic gradient -transport -albumin -globulins -clotting -fibrinogen -antibodies Blood composition
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Blood cells Formed elements: - erythrocytes (RBCs) (>90% of all cells) - leukocytes (WBCs) -granulocytes -neutrophil (40-75%) -eosinophil (1-6%) -basophil (<1%) -agranulocytes -lymphocyte (20-50%) -monocyte (2-10%) - platelets
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Erythrocytes -transport of gasses -oxygen to tissues -CO 2 away from tissues -in mammals no organelles -plasma membrane -heamoglobin (iron) -maintenance enzymes -originate in bone marrow -shape maximizes surface area -flexible (capillaries) -120 day life span -no organelles…..
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Leukocytes -immune response -use blood as transport -act in tissue (migratory) -originate in bone marrow -granulocytes -secretory granules visible -names stems from staining -multi-lobed nucleus -`polymorphonuclear leukocyte’ -`myeloid cells’ -agranulocytes -secretory granules not visible -mononuclear leukocytes
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