Anatomy of cnidarians | Britannica
cnidarian , or coelenterate , Any of about 9,000 species of mostly marine aquatic invertebrates, constituting the phylum Cnidaria (or Coelenterata), that are unique in possessing specialized stinging cells (cnidocytes) borne on the tentacles.
Cnidaria - Wikipedia
The term cnidaria derives from the Ancient Greek word knídē (κνίδη “nettle”), signifying the coiled thread reminiscent of cnidocytes. The word was first coined in 1766 by the Swedish naturalist Peter Simon Pallas .
Cnidarian - Polyp, Medusa, Tentacles | Britannica
2024年10月18日 · The Canadian Encyclopedia - Cnidaria; Nature - Systematic review of cnidarian microbiomes reveals insights into the structure, specificity, and fidelity of marine associations; University of Minnesota Libraries - Sponges and Cnidarians; Smithsonian Libraries and Archives - DSpace Repository - Cnidaria: Introduction
Cnidarian | Definition, Life Cycle, Classes, & Facts | Britannica
2024年10月18日 · Cnidarian, any member of the phylum Cnidaria (Coelenterata), a group of more than 9,000 species of mostly marine animals. The group includes corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans. Learn more about cnidarians in this article.
28.2A: Phylum Cnidaria - Biology LibreTexts
2024年11月23日 · Introduction to Phylum Cnidaria. Phylum Cnidaria includes animals that show radial or biradial symmetry and are diploblastic: they develop from two embryonic layers. Nearly all (about 99 percent) cnidarians are marine species.
A Guide to the Cnidarians: Basics and Beyond - ThoughtCo
2019年3月30日 · Cnidarians are a diverse group of invertebrates that come in many shapes and sizes but there are some basic features of their anatomy that most share in common.
Phylum Cnidaria | Biology for Majors II - Lumen Learning
Identify the common characteristics of phylum Cnidaria. Cnidarians represent a more complex level of organization than Porifera. They possess outer and inner tissue layers that sandwich a noncellular mesoglea. Cnidarians possess a well-formed digestive system and carry out extracellular digestion.
Cnidaria may be the most basal phylum with tissue- level organization, but, unlike nearly all other animals, cnidarians are diploblastic, having only two basic cell
5.8.3: Phylum Cnidaria - Biology LibreTexts
Phylum Cnidaria includes animals that exhibit radial or biradial symmetry and are diploblastic, meaning that they develop from two embryonic layers, ectoderm and endoderm. Nearly all (about 99 percent) cnidarians are marine species.
Biology of Marine Cnidarians [Phylum Cnidaria (= Coelenterata…
2020年2月1日 · Biological aspects of marine cnidarians viz. geographic range, habitat, anatomy, size and colouration, communication and perception, behaviour, food habits, reproduction and development, defence mechanism, association and predators are explained here.