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25 Cards in this Set
- Front
- Back
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Mobility
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One way that seperates animals from all other kingdoms
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Motile
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Organisms that can move from place to place
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Sessile
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Organisms that permanently attach to an area
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Assymetrical
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Having no particular body arrangement
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Radial symmetry
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All body parts radiate from any central area
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Bilateral symmetry
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Body parts arranged in two sides which are visually mirror images of one another
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Dorsal
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Top surface of a radial symmetric organism
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Ventral
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The bottom surface of a radial symmetric organism
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Snterior
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Front end of bilaterally symmetric animal
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Posterior
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Rear end of bilaterally symmetric animal
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Medial
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Plane that divided a bilateral animal into mirror images
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Segmentation
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The repeating units or segments of an organism
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Tissue development
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Process by which cells differentiate into different tissues starting at the point of fertilization
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Cleavage
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Cell division
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Blastula
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A hollow ball of cells
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Gastrula
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Cup-shaped embryo
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Ectoderm
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Outer layer forming skin, nerves, and sense organs
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Mesoderm
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Middle layer forming muscles,reproductive organs, circulatory system, excretory system
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Endoderm
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The inner layer forming digestive tract and respiratory system
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Coelomates
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Organisms that have a true coelom
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Coelom
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Fully lined body cavity they us hollow
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Blastopore
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An opening to the cavity formed during the blastula stage and will either develop into a mouth or anus
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Protostome
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Animal where blastopore develops into mouth
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Deuterostome
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Animal where blastopore develop into an anus
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Hydrostatic skeleton
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Skeletal system where muscles surround and are supported by a water-filled cavity (coelom)
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