Question

State the difference between cnidoblast and colloblast

Answer 1

Answer:

Definition

Cnidocyte: Cnidocyte refers to a specialized cell, containing cnidocyst, which is involved in capturing the prey in cnidarians.

Nematocyst: Nematocyst refers to an organelle inside the cnidocyte, consisting of an ejectable thread that causes a sting.

Significance

Cnidocyte: Cnidocyte is an ectodermal cell in cnidarians.

Nematocyst: Nematocyst is the organelle that occurs inside the cnidocyte.

Alternative Names

Cnidocyte: Cnidocytes are also called cnidoblasts or nematocytes.

Nematocyst: Nematocyst is also called cnidocyst or cnida.

Role

Cnidocyte: Cnidocytes are stinging cells used in defense and capturing prey.

Nematocyst: Nematocyst contains toxins to be injected into the predator or prey.

Answer 2

The cnidoblast can be differentiated from colloblast on the basis of physical and chemical function.

Explanation:

• Cnidoblast is the specialized cells that helps in the prey capturing in case of cnidarians.
• Cnidoblast forms the lining of ectodermal cells of the cnidarians.
• Colloblast cells helps in the food capturing in case of the ctenophora. These cells stick to their prey.
• The eosinophilic granules are present on the apical surface of the coloblast cells in ctenophora.

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