The First Many Celled Animals: Sponges

Duration: 576 ft.

Year Published: 1962

Complete Record: Shows through animation, microcinematography, and time-lapse photography the basic differences between single-celled organisms and the colony of several cell types that compose the body of the sponge. Explains the need for and advantages of the multi cell-type of life through a demonstration of surface area to volume relationships. Animates the functioning of the cells within the sponge and uses live-action photography to illustrate sexual and asexual reproductive methods. Concludes that the 5000 species are grouped according to their skeletons.

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