What Is An Amphibian? (1962)
The film discusses the evolution of amphibians, highlighting their origins from fish-like ancestors that adapted to land during the Devonian period. It explains how these primitive animals developed features such as legs from bony fins, a three-chambered heart, and the necessity of laying eggs in water. The film also explores the life cycles of various amphibians, including the transformation from larvae to mature forms, and the role of the thyroid gland in maturation. Additionally, it touches on the diversity of amphibians and their adaptations to different environments.
Keywords
amphibians, evolution, Devonian period, fish-like ancestors, adaptation, life cycle, thyroid gland, larvae, bony fins, three-chambered heart
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