BIOL 1031: Lab 10+11 - Bilateria: The Protostomes

Vocabulary flashcards covering key concepts from the Bilateria and Protostomes lecture.

Bilateria

Animals with bilateral symmetry associated with cephalization.

Cephalization

The process of forming a true 'head' in bilateral animals.

Dorsal

Refers to the upper side or 'back' of a bilaterally symmetrical animal.

Ventral

Refers to the lower side or 'belly' of a bilaterally symmetrical animal.

Anterior

The end of the body that is nearest to the front.

Posterior

The end of the body that is nearest to the back.

Coelomate

An organism whose body cavity is lined with mesodermal tissue.

Acoelomate

An organism that lacks a body cavity.

Pseudocoelomate

An organism that has a body cavity not completely lined by mesoderm.

Ecdysis

The process of molting of the exoskeleton in ecdysozoans.

Phylum Platyhelminthes

The phylum that includes flatworms, which are acoelomates.

Phylum Annelida

The phylum that includes segmented worms, characterized by their coelom.

Phylum Mollusca

The phylum that includes mollusks, characterized by unsegmented bodies and a coelom.

Dioecious

Organisms having separate male and female individuals.

Hermaphroditic

An organism that possesses both male and female reproductive organs.

Subphylum Chelicerata

A subphylum of arthropods that includes spiders and horseshoe crabs.

Subphylum Myriapoda

A subphylum of arthropods that includes centipedes and millipedes.

Subphylum Crustacea

A subphylum of arthropods that includes crabs, lobsters, and shrimp.

Subphylum Hexapoda

The subphylum of arthropods that includes insects.

Class Insecta

The class within Hexapoda that represents the largest number of described species.

Radula

A rasping tongue with chitinous teeth found in most mollusks.