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20. LOCOMOTION AND, MOVEMENT, , Locomotion is the voluntary movements resulting in a, change in location., , All locomotion are movements but all movements are, not locomotion. Both are interlinked. E.g., , e In Paramoecium, cilia help in the movement, of food through cytopharynx and in, locomotion., , e Hydra use tentacles to capture prey and for, locomotion., , e Limbs help to change body postures and for, locomotion., , Types of movement in human being, , e Amoeboid movement: By pseudopodia, formed by streaming of protoplasm as in, Amoeba. Cytoskeletal elements like, microfilaments also help for this. E.g., Macrophages & leucocytes., , e Ciliary movement: By cilia. E.g. ciliary, movements in trachea (to remove dust, particles and foreign substances), and, oviducts (for the passage of ova)., , e Muscular movement: By muscles. E.g., movement of limbs., , Flagellar movement helps in the swimming of, spermatozoa, maintenance of water current in the canal, system of sponges and in locomotion of Protozoans, like Euglena.