Zoology: Non-Chordates Review

A set of vocabulary flashcards based on the lecture notes covering the characteristics and specific examples of non-chordate phyla including Porifera, Cnidaria, Ctenophora, Platyhelminthes, and Aschelminthes.

Porifera

A phylum of the animal kingdom characterized by non-chordates with intracellular digestion and the presence of a mesohyl.

Intracellular Digestion

The process of breaking down food inside cells, which is a characteristic feature of Porifera.

Cnidaria

A phylum of non-chordates that includes organisms like Obelia and contains specialized structures called nematocysts.

Obelia

A genus within the phylum Cnidaria that is known for exhibiting metagenesis.

Metagenesis

The alternation of generations, such as the cycle between polyp and medusa forms, specifically mentioned in relation to the genus Obelia.

Ctenophora

A phylum of animals categorized by their bioluminescence and specific body symmetry.

Bioluminescence

The emission of light by a living organism, which is a key characteristic mentioned for Ctenophores.

Platyhelminthes

A phylum of non-chordate flatworms that are noted for specific excretion mechanisms and being self-fertilising.

Aschelminthes

A phylum of animals characterized by a pseudocoelomata body cavity and nuclei, including organisms like Ascaris.

Ascaris

A genus of the phylum Aschelminthes that is found in the intestine.

Nematocyst

A specialized stinging organelle or cell found in Cnidarians.

Mesohyl

A gelatinous matrix found in Porifera between the outer and inner layers.

Metazoans

Multicellular animals that are divided into various groups including Porifera.

Totipotent

Refers to self-renewing cells, such as those found in Porifera, that have the potential to develop into any other cell type.

Pseudometamerism

A condition or body plan feature discussed in relation to the phylum Aschelminthes.

Pseudocoelomata

A classification for animals, like nematodes, that possess a body cavity not entirely lined by mesoderm.

Annelida

A phylum of non-chordates that includes Hirudinaria and is characterized by the presence of muscles.

Hirudinaria

A specific animal mentioned as a member of the phylum Annelida.

Ctenidia

Respiratory structures or gills associated with the genus Unio.

Aristotle's lantern

A complex chewing apparatus mentioned as a feature in the study of non-chordate zoology.

Enterobius

A genus mentioned in the context of animal features and internal organization systems.