01:119:116 Lecture Notes - Lecture 3: Trichinosis, Millipede, Gastrointestinal Tract
24 Mar 2018
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Gen bio 116 lecture 6 - unikont diversity iii. -> cc derived traits of bilateria, protostomes, deuterostomes. *know the shared derived traits that unite members of each group. Lack more specific derived traits present in most animals. Sponge morphology simple sponges- some are more complex. Not a digestive cavity - digestion is intracellular **fig 33. 4. C. i. ii. iii. iv. i. ii. iii. iv. i. ii. iii. iv. Very small - 50um-2mm smaller than many protists. Mantle: thin sheet of tissue covering visceral mass a) Visceral mass: main body mass, contains viscera (internal organs) Body wall, coelom, many organs divided into segments. Often 3 parts - head, thorax (legs and wings), abdomen **fig 33. 38. Jointed appendages - often modified - motility, feeding sensory. Costs: limits growth (must molt to grow), limits size a. b. c. a. b. a. b. c. d. e.
