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https://www.britannica.com/animal/cnidarian
The phylum Cnidaria is made up of four classes: Hydrozoa (hydrozoans); Scyphozoa (scyphozoans); Anthozoa (anthozoans); and Cubozoa (cubozoans). All cnidarians share several attributes, supporting the theory that they had a single origin.
https://skeletalphylum.weebly.com/cnidaria.html
Cnidarians are diverse and come in many shapes and sizes but there are some basic features of their anatomy that most share in common . The body wall of a cnidarian consists of three layers, an outer layer known as the epidermis, a middle layer called the mesoglea, and …
https://phylumskeletalsystem.weebly.com/cnidaria.html
Cnidaria is a phylum containing over 10,000 species of animals found mainly in aquatic and marine environments. Their body mostly consists of a non living jelly like substance. The two different forms of a cnidarian are either the polypoid shape or the medusoid shape. they differ from each other based on the directions of their tentacles.
http://planet.uwc.ac.za/nisl/biodiversity/Part_1/page_16.htm
Cnidarian Structure. The Cnidarians are more common and have bodies clearly divided into two cellular layers, each layer one-cell thick. The outer layer of cells is the ectoderm whereas the inner layer is the endoderm. The individual cells of the ectoderm are specialized for various functions such as protection, secretion,...
https://study.com/academy/lesson/cnidaria-excretory-system.html
Unlike us, cnidarians have very few excretory structures. Food is ingested through a mouth and passed into a central digestive region known as the coelenteron. This area is similar to a human's ...
https://manoa.hawaii.edu/exploringourfluidearth/biological/invertebrates/phylum-cnidaria
Many cnidarians take two main structural forms during their life cycles, a polyp form and a medusa form. The polyp form has a body shaped like a hollow cylinder or a bag that opens and closes at the top (Fig. 3.25 A). Tentacles form a ring around a small mouth at the top of the bag.
https://www.thoughtco.com/a-guide-to-the-cnidarians-129832
Mar 30, 2019 · Cnidarians take on two basic forms, a medusa and a polyp. The medusa form is a free-swimming structure which consists of an umbrella-shaped body (called a bell), a fringe of tentacles that hang from the edge of the bell, a mouth opening located on the underside of the bell, and a gastrovascular cavity.
https://quizlet.com/5143965/cnidaria-questions-flash-cards/
Largest class of Cnidaria; all are marine; includes corals and sea anemones (no medusa form; thick mesoglea; GVC divided by septa); many have symbionts; some filter feed or use mucus net; monecious or dioecious; invididual or colonial; subclass: Zooanthera (anemones & stony corals; many tentacles; external skeleton if present); subclass Alcyonaria (= octocorals, soft corals & relatives; 8 tentacles; …
https://quizlet.com/5673164/phylum-cnidaria-flash-cards/
in cnidarians, the jellylike material located between the ectoderm and the endoderm hydrostatic skeleton Support structure that consists of water contained under pressure in a closed cavity.
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