Question

In vertebrates, the coelom is derived from which germ layer?

• A. Ectoderm
• B. Endoderm
• C. Mesoderm
• D. Both ectoderm and endoderm

Answer 1

The correct option is C

Mesoderm

The correct option is C

Explanation of the correct option :

1. An epithelial membrane lines a genuine coelom, which originates wholly inside the mesoderm germ layer.
2. The organs within the coelom are likewise lined by this membrane, which connects and holds them in place while allowing them to move freely.

Explanation of the incorrect option :

Option A:

1. During gastrulation, the ectoderm develops from the epiblast.
2. The leftover epiblast cells are referred to as ectoderm once the mesoderm forms.

Option B:

1. The coelom of deuterostomes develops through a process known as enterocoely, in which the mesoderm grows as pouches pinched off from the endoderm tissue.
2. The mesoderm, which gives birth to the coelom, is formed when these pouches join.

Option D:

1. The neurological system and epidermal skin cells are produced by the ectoderm, whereas the digestive system and other interior organs are produced by the endoderm.

Final answer: Coelom is formed from the mesoderm germ layer in vertebrates.