What do you mean by diploblastic and triploblastic animals?

Diploblastic animals have two germinal layers (ectoderm and endoderm) during embryonic development, e.g., poriferans. Triploblastic animals have three germinal layers (ectoderm, mesoderm and endoderm) during embryonic development, e.g., platyhelminthes.

Why some animals are coming under diploblastic and others in triploblastic animals give reason?

They are organised into recognisable tissues. But, triploblastic animals possess an additional germ layer, the mesoderm which they can develop complex organs in the body. Thus, the key difference between diploblastic and triploblastic animals is the type of the cleavage during embryonic development.

Which of the following animals are diploblastic and triploblastic?

Examples of diploblastic species include jellyfish, comb jellies, corals, and sea anemones. Examples of triploblastic animals include platyhelminthes, annelids, arthropods, molluscs, echinoderms, and chordates.

What determines if an animal is diploblastic or triploblastic?

The key difference between diploblastic and triploblastic animals is that diploblastic animals produce two germ layers excluding mesoderm and triploblastic animals produce all three germ layers.

Which is the first triploblastic animal?

Platyhelminthes are the first simplest triploblastic animals.

What are triploblastic animals called?

Organisms of Kingdom Animalia having three primary embryonic cell layers i.e., the ectoderm, mesoderm and endoderm from which different tissues and organs of the animal’s body differentiate out are known as triploblastic. Example: Frog.

Which is not seen in first triploblastic animals?

(a) From evolutionary point of view platyhelminthes are first triploblastic animals but do not contain coelom.

What are the examples of diploblastic animals?

Cnidaria and Ctenophora are considered as diploblastic. Jellyfish, comb jellies, corals and sea anemones are the examples of diploblastic animals. Triploblastic organisms form all three primary germ layers – endoderm, ectoderm and mesoderm – during the gastrulation of the blastula.

What do you mean by triploblastic animals?

Triploblastic: An animal possessing 3 major tissue layers. It has a middle layer (the mesoderm), between the endoderm and the ectoderm. Radial Symmetry: Animals having symmetry around a central axis. Animals with radial symmetry are diploblastic. Coelom: Fluid-filled cavity within the mesoderm.

Can diploblastic animals have a body cavity?

Body Cavities: Diploblastic animals do not have body cavities. There is only one cavity in the body. It is called a gastrovascular cavity. It is used for digestion. Endoderm Development: Endoderm of the diploblastic animals forms true tissues and the gut.

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