EVERYDAY SCIENCE

Detailed explanation-1: -Cnidocytes are specialized cells that define the phylum Cnidaria. They possess an “explosive” organelle called cnidocyst that is important for prey capture and anti-predator defense.

Detailed explanation-2: -Phylum coelenterata (cnidaria) has specialised structure called cnidoblasts or cnidocytes which contain the stinging capsules or nematocytes. Cnidoblasts are used for anchorage, defense and for the capture of prey.

Detailed explanation-3: -Cnidarians take in food through their mouths, which is then digested in the coelenteron. Nutrients are then passed to other areas of the body for use, and waste products are expelled either through the mouth or through surface cells via water circulation.

Detailed explanation-4: -Cnidarians have no well-defined separate respiratory, circulatory, or excretory organs; their tissues, composed of two cell layers, surround a cavity known as a coelenteron (gastrovascular cavity), which is the basic internal organ. Tentacles surrounding the mouth are used to capture and ingest food.