WebJun 8, 2024 · The Ecdysozoans are the most diverse group of animals, containing the nematode worms and the arthropods. These organisms have an external covering called a cuticle that protects their soft internal organs from water loss and the outside environment. Web1.02.2.3 Ecdysozoa. The Ecdysozoa is the second major clade within the Bilateria (Figures 1 and 6 ), and it includes a subset of the animal phyla generally considered part of the …
Ecdysozoa - Wikipedia
WebAug 26, 2010 · In chordates, it is located dorsally to the notochord. In contrast, other animal phyla possess solid nerve cords that are located either ventrally or laterally. The nerve cord found in most chordate embryos develops into the brain and spinal cord, which compose the central nervous system. WebThe name derives from the word ecdysis, which refers to the shedding, or molting, of the exoskeleton. The phyla in this group have a hard cuticle that covers their bodies, which must be periodically shed and replaced for them to increase in size. eatery vector
Derivatives of Integument: 2 Derivatives Vertebrates Chordata …
WebAug 26, 2010 · Chordata a phylum of animals distinguished by their possession of a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail at some point during their development dorsal hollow nerve cord a hollow, tubular structure derived from ectoderm, which is located dorsal to the notochord in chordates Echinodermata WebMain article: Ecdysis Cicada climbing out of its exoskeleton while attached to tree The exoskeleton cannot stretch and thus restricts growth. Arthropods, therefore, replace their exoskeletons by undergoing ecdysis (moulting), or shedding the old exoskeleton after growing a new one that is not yet hardened. WebTraditional metazoan phylogeny classifies the Vertebrata as a subphylum of the phylum Chordata, together with two other subphyla, the Urochordata (Tunicata) and the … comofolk stone