Animals

LAb 3

Cnidaria

This group includes jellyfish, corals and sea anemones, characterized by their radial symmetry and specialized cells called cnidocytes. Two True Tissues. Gastrovacular Cavity. Polyps = tube shape. Meudsa = bell shape.

Gastrovacular Cavity

It's a sac-like structure with a single opening that serves as both the mouth and the anus, meaning food enters and waste exits through the same opening.

Lophotrochozoa

Bilatieral symmetry. Tripoblastic (three germ layers) Platyhelminths and Mollusca - Acolemates. No coelum. Includes Annelids in clade.

Coelum

Fluid filled cavity.

Annelida

Clade = lophotrochozoa. Metameric = segmented linear section s, forming little rings. NO Tagmosis.Three germ layer and a coelom. Organisms in this phylum include earthworms and leeches.

Mollusca

Clade = Lophotrochozoa. Coelomates. HArd shell of calcium carbonate. Not metameric or tagmosis. Gastrapods = class.

Ecdysozoa

Cuticle - tought skin they shed. Includes arthropods and nematodes.

Insecta (Locust)

Ecdosozoans with three main body sections, typically have wings and undergo metamorphosis. Bilaterial. three germ layers. Body covering. Distinc head. coelmates. Alimentary canal. Metameric, Tagmosis.

Alimnetary canal

An alimentary canal has two openings: a mouth for ingesting food, and an anus for eliminating waste, as shown in this nematode.