Part 1 of Essay
The terms venom and poison are often used interchangeably. Although both venomous and poisonous animals have potentially dangerous toxins in their bodies, the way that toxin is delivered differs. Venomous animals have an active delivery system and may use their toxin for protection or to help them catch food. Unlike pois ....

Part 2 of Essay
.... are marine invertebrate animals of the phylum Echinodrmata, having external skeletons of calcareous plates just under the skin, no head, and a water vascular-system with tube feet. Echinoderms are radially symmetrical, lack specialized ecretory organs, and reproduce sexually. Echinoderms have the ability to regenerate lost or injured body parts. Starfish: Starfishes are free-living echinoderms that have a flat, star-shaped or pentagonal body, usually with a continuous disc that has five or more ray-like ex ....