WebFlatworms have three embryonic tissue layers that give rise to surfaces that cover tissues (from ectoderm), internal tissues (from mesoderm), and line the digestive system (from endoderm). The epidermal tissue is a single layer cells or a layer of fused cells (syncytium) that covers a layer of circular muscle above a layer of longitudinal muscle.
Ctenophora (Comb Jellies) Encyclopedia.com
WebAn animal possessing 2 major tissue layers. These contain the outer layer (the ectoderm) and the inner layer (the endoderm). During gastrulation, diploblastic organisms form a gastrula which consists of two key germ layers. These two germ layers are composed of endoderm and ectoderm but not mesoderm. WebChaper 13- Cnidaria and Ctenophora. Term. 1 / 20. The traditional view of cnidarians relative to germ layers is that cnidaria possess. a. only one germ layer, the ectoderm, … flowrotor
Cnidaria & Ctenophora: Habitat, Morphology
Webctenophore, byname Comb Jelly, any of the numerous marine invertebrates constituting the phylum Ctenophora. The phylum derives its name (from the Greek ctene, or “comb,” and phora, or “bearer”) from the series of … For a phylum with relatively few species, ctenophores have a wide range of body plans. Coastal species need to be tough enough to withstand waves and swirling sediment particles, while some oceanic species are so fragile that it is very difficult to capture them intact for study. In addition, oceanic species do not preserve well, and are known mainly from photographs and from observers' n… WebCtenophores have a pair of anal pores, which have sometimes been interpreted as homologous with the anus of bilaterian animals (worms, humans, snails, fish, etc.). Furthermore, they possess a third tissue layer … flow rope dragon roll