BIOM 3010 Lecture Notes - Lecture 8: Anastomosis, Venous Blood, Pericardium
7 Dec 2017
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Lecture 8 digestive & cardiovascular system 1. Hindgut-fermenting: simple stomach, large cecum and lengthy colon, chew thoroughly. Ideal for large amount of low quality food: ascending colon = dorsal + ventral colon. Foregut-fermenting: complex stomach, short colon, multi-chambered stomach for digesting cellulose, chew less thoroughly, slower processing (must be a certain size to pass into omasum, rumen > reticulum > omasum > abomasum (true stomach) Ideal for low amount of high quality food. Mammalian omnivores: simple stomach, variable length of small intestine, cecum and colon. Functions of the cardiovascular system: transport, regulate, protection. Blood: ~7-8% of body weight, cells 99% are red blood cells (erythrocytes), 1% are white blood cells(leukocytes, platelet cell fragments, plasms liquid fraction. Vessels: arteries away from heart, thick, elastic & muscular, arterioles, carry blood to capillary beds in organs, veins toward heart, thin, less elastic & less muscular, valves, veins drain capillary beds, venules, capillaries.
