NATS 1675 Lecture Notes - Lecture 11: Vascular Tissue, Yolk Sac, Intestinal Villus
25 Mar 2016
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Chapter 6: vascular tissue: b-1 vascular tissue is concerned with internal transport and includes blood and lymph, b-2 a. lymph has the same composition as tissue fluid. Lymphatic capillaries collect excess tissue fluid and return it to the blood stream: 2. Lacteals within the intestinal villi receive lipoproteins and transport them to the blood stream: 3. They initiate a sequence of reactions that cause blood clotting. Individual blood cells are biconcave discs: 4-6 million/mm3, a healthy person produces 1 million rbcs every second. 2: during fetal development the rbcs are produced in the yolk sac, liver and, the spline, b-9 if blood is separated into plasma and cells, plasma = 55% by volume; cells = 45% by volume. Of the cells, erythrocytes makeup > 99% by volume and > 94% by number. Plasma is straw-yellow in colour, and includes water, amino acids, proteins, carbohydrates, lipids, vitamins, hormones, electrolytes and cellular wastes (fig.
