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Definitions from the Web

Term: Protostome

Description:

A protostome is a major group of animals characterized by embryonic development in which the initial opening formed during gastrulation becomes the mouth, and the anus develops later. This group includes various phyla such as arthropods (insects, crustaceans), mollusks (snails, squids), and annelids (earthworms, leeches).

Senses and Usages:

Sense 1: Developmental Process

In developmental biology, the term protostome refers to a particular process of embryonic development where the first opening becomes the mouth.

Example Sentence: During protostome development, the blastopore of the embryo eventually forms the oral cavity.

Sense 2: Taxonomy

In taxonomy, protostome is used to categorize animals that exhibit protostomy in their embryonic development.

Example Sentence: The protostome animals, such as insects and mollusks, belong to different phyla with distinct characteristics.

Related Products:

• Books on Protostome Biology
• Insect Books
• Mollusk Books
• Annelid Books