BIOL 2030 Lecture Notes - Lecture 1: Gastrovascular Cavity, Cytostome, Symmetry In Biology
30 Mar 2017
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Move and feed by means of pseudopodia (a free form of projection of the cell) Locomotion: lobopodia, filopodia (thin pseudopodia that may branch but do not rejoin) or cytoplasmic flow without forming discrete pseudopodia. Animal parts: the plasmalemma (cell membrane), ectoplasm, endoplasm, nucleus, contractile vacuole (usually appear empty), food vacuoles, pseudopodia. Locomotion: flagellar locomotion, and euglenoid movement (worm-like contraction and expensions. Animal parts: the flagellum arise from the reservoir, at the base of the flagellum, there is a photoreceptive eyespot called the stigma. A contractile vacuole (for osmoregulation) is visible posterior to the reservoir. All are parasitic in the blood of man and other vertebrates. Possess cilia, and two structurally and functionally different nuclei. Locomotion: ciliary locomotion, a cilium propels water parallel to the surface of the attachment. Provide the means for directed movement and prevents stagnant layer of water accumulating.
