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Hydra

5 minutes 31 seconds

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Still image from Hydra

Part of the "The Biology Classics" series. Hydra is a genus of simple fresh-water animals possessing radial symmetry. Observes feeding behavior of hydra, shows detailed microscopy of stinging cells used in capturing prey, and reviews two digestive processes: cellular and extracellular. Also covers locomotion, reproduction by budding, the development of sex organs, and symbiotic guests, both external and internal. Accessibility options on the DVD are: (1) expanded description, (2) English subtitles in a black box, (3) subtitled description.

Media Details

Runtime: 5 minutes 31 seconds

Microscopic view of an oval-shaped single-celled organism. Caption: In cells that live in fresh water,
The Biology Classics
Episode 1
11 minutes 30 seconds
Grade Level: 8 - 12
Close up view of a microscopic creature. A light green cell wall with a lighter beige internal structure is visible. Caption: are exactly what the algae cells need
The Biology Classics
Episode 2
5 minutes 31 seconds
Grade Level: 8 - 12
Close up of two flat, oval, spotted worm-like animals. Caption: and, over time, regenerate their missing parts.
The Biology Classics
Episode 3
6 minutes 40 seconds
Grade Level: 8 - 12
Extreme closeup of the cell structure showing the translucent outline of the heart. Caption: Daphnia's heart keeps its circulatory fluid in motion.
The Biology Classics
Episode 4
6 minutes 19 seconds
Grade Level: 8 - 12