01:119:116 Lecture 25: Lecture 25 Notes - blood
5 Oct 2016
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42. 4 & 43. 1: intro, the average person has approx. 5l of blood: functions of blood, transport, fluid balance, defense against pathogens, composition, cells in fluid (red blood cells, white blood cells and platelets, liquid is called plasma. Increase osmotic pressure so that fluid returns to the capillaries: act as buffers, albumin regulates ph and fluid balance. Immunogloblins (antibodies) found in the plasma and important in the defense of invaders into the body: apolipoproteins lipid transport. Lipids are insoluble so they must be bound to a protein: fibrinogens involved in blood clotting. Serum= plasma minus fibrinogens: transported blood, nutrients (digestion, hormones (endocrine) Cellular components: cells are produced in the bone marrow of certain bones, ribs, vertebrae, sternum and pelvis, multipotent stem cells. Have the potential to specialize into any type of blood cell: when a stem cell divides. Other daughter cell will remain a stem cell: erythrocytes (red blood cells, most numerous of all blood cells.
