BIOL302 Lecture 8: Blood and Blood Vessels
12 Feb 2017
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Document Summary
Blood: connective tissue responsible for transport of gases, nutrients and cells, homeostasis (osmotic buffer), and wound healing. Plasma: aqueous solution that facilitates exchange of materials, contains dissolved solutes and minerals. Formed elements: aka blood cells, mostly composed of erythrocytes, some leukocytes and platelets. Erythrocytes: biconcave anucleated cells, responsible for the transport of gasses via hemoglobin, no organelles. Leukocytes: use blood as a transport to tissues where they carry out their immune response, Granulocytes: visible secretory vesicles, multi-lobed nuclei, originate in bone marrow. Neurtophil: multi lobed nucleus, neutral/pale staining granules, bigger than rbc, phagocytic. Eosinophil: bilobed nucleus, large red staining granules, granules are the same size, phagocytic. Basophil: dark/blue staining granules, granules are various sizes, nucleus hard to see, can"t see cytoplasm, little bigger than rbc, allergic response and anaphylaxis, acute immune response. Lymphocyte: large blue nucleus occupies most of the cell, can see a little cytoplasm, same size as rbc.
