What is an animal whose mouth is formed from the Blastopore?

What is an animal whose mouth is formed from the Blastopore?

protostome. an animal whose mouth is formed from the blastopore. deuterostome.

What is a poison filled cnidarian stinging structure?

Cnidarians get their name from the cnidocytes, or stinging cells, located along their tentacles. Cnidarians use cnidocytes for defense and to capture prey. Within each cnidocyte is a nematocyst—a poison-filled, stinging structure that contains a tightly coiled dart.

Which of these is a Protostome?

Protostomia, group of animals—including the arthropods (e.g., insects, crabs), mollusks (clams, snails), annelid worms, and some other groups—classified together largely on the basis of embryological development.

What kind of animal body cavity forms completely within the mesoderm?

true coelom

What is a Schizocoelic Coelom?

Schizocoelic (adj.) describes a type of true coelom that develops by the separation of mesoderm tissue. In the illustration below, the mesoderm develops during gastrulation, followed by the development of the schizocoel within the mesoderm.

What are Enterocoelomate animals?

Enterocoelomate, any animal in which the mesoderm-lined body cavity (coelom) arises in the embryonic stage as an outpocketing of the developing gut (enteron).

What is Schizocoely and Enterocoely?

Schizocoelous refers to the condition of embryonic development in which the body cavity is formed by the splitting of the mesoderm while enterocoelous refers to the condition in which the coelom forms from pouches “pinched” off of the digestive tract.

Which are called Eucoelomates?

The animals which possess true coelom are called eucoelomates or coelomates. In this case, the mesoderm of the embryo provides a cellular lining, called coelomic epithelium or peritoneum, to the cavity.

How many animals are Eucoelomates?

Kingdom Animalia- Eucoelomates. There are six phyla which are considered eucoelomates. A (eu)coelomate has a true coelom (fluid filled body cavity) which surrounds the gut and is lined on both sides by mesoderm.

Are echinoderms Acoelomate?

The protostome coelomates (acoelomates and pseudocoelomates are also protostomes) include the mollusks, annelids, arthropods, pogonophorans, apometamerans, tardigrades, onychophorans, phoronids, brachiopods, and bryozoans. Deuterostomes include the chaetognaths, echinoderms, hemichordates, and chordates.

Is a sea cucumber a Coelomate?

They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide….Sea cucumber.

Sea cucumber Temporal range: Middle Ordovician-present PreꞒ Ꞓ O S D C P T J K Pg N
Phylum: Echinodermata
Subphylum: Echinozoa
Class: Holothuroidea Blainville, 1834

Where do echinoderms eat?

Echinoderms are the staple diet of many animals, including the sea otter. On the other hand, echinoderms eat seaweed and keep its growth in check. Recall that the sea urchin is a grazer, mainly feeding on algae on the coral and rocks. Recently, some marine ecosystems have been overrun by seaweed.

How do echinoderms eat?

Echinoderms have a simple digestive system with a mouth, stomachs, intestineand anus. In many, the mouth is on the underside and the anus on the top surface of the animal. Sea stars can push their stomachs outside of their body and insert it into its prey allowint them to digest the food externally.

How do echinoderms develop?

Most echinoderms develop from larvae to adolescent echinoderms by direct, or indirect development. In direct development, the fertilized egg is able to enter juvenile stage without becoming a larva. The juveniles stay close to the parent, and are cared for and looked after.