Cnidaria - Wikipedia
Cnidaria is a phylum of animals with over 11,000 species, including jellyfish, sea anemones, corals and some parasites. They have a decentralized nervous system, cnidocytes, and two basic body forms: medusae and polyps.
Cnidarian | Definition, Life Cycle, Classes, & Facts | Britannica
4 天之前 · Cnidarians, also known as coelenterates, are a group of marine invertebrates with two body forms: polyp and medusa. They have stinging cells, simple tissues, and diverse shapes and colors. Learn more about their life cycle, classes, and examples.
What Are Cnidarians? - Types and Characteristics - AnimalWised
2023年10月4日 · Cnidarians are a diverse group of aquatic animals that includes jellyfish, corals, sea anemones, and hydras. Learn about the different types of cnidarians, their characteristics, and reproduction.
28.2: Phylum Cnidaria - Biology LibreTexts
The phylum Cnidaria contains about 10,000 described species divided into four classes: Anthozoa, Scyphozoa, Cubozoa, and Hydrozoa. The anthozoans, the sea anemones and corals, are all sessile species, whereas the scyphozoans (jellyfish) and cubozoans (box jellies) are swimming forms.
28.2A: Phylum Cnidaria - Biology LibreTexts
2023年10月31日 · The phylum Cnidaria contains about 10,000 described species divided into four classes: Anthozoa, Scyphozoa, Cubozoa, and Hydrozoa. The anthozoans, the sea anemones and corals, are all sessile species, whereas the scyphozoans (jellyfish) and cubozoans (box jellies) are swimming forms.
Exploring the Mysteries of Cnidarians: Form, Function, and …
2024年2月5日 · Learn about the distinctive characteristics, feeding behaviors, movement mechanisms, and types of symmetry of cnidarians, a diverse group of animals with stinging cells. Discover their ecological importance, human interactions, and conservation concerns in this comprehensive article.
Cnidarians - Examples, Characteristics, Reproduction, & Lifecycle
2024年8月24日 · Learn about cnidarians, a group of aquatic invertebrates with specialized stinging cells and two body forms: polyps and medusae. Find out their size, body plan, skeleton, cellular layers, organ system, and examples of jellyfish, sea anemones, corals, and more.
28.2 Phylum Cnidaria - Biology - OpenStax
The phylum Cnidaria contains about 10,000 described species divided into four classes: Anthozoa, Scyphozoa, Cubozoa, and Hydrozoa. The anthozoans, the sea anemones and corals, are all sessile species, whereas the scyphozoans (jellyfish) and cubozoans (box jellies) are swimming forms.
Cnidarian - Polyp, Medusa, Tentacles | Britannica
4 天之前 · Learn about the tissues, muscles, and skeletons of cnidarians, a phylum of animals with two cell layers and a jellylike mesoglea. Find out how mesoglea supports the shape and movement of polyps and medusae, and how different types of …
Cnidarian - Radial Symmetry, Polyp & Medusa | Britannica
2024年8月23日 · Cnidarians, also known as Coelenterata, are radial metazoans with nematocysts and two body forms: polyp and medusa. Learn about their evolution, classification and fossil record from Britannica, the online encyclopedia of science.