Invertebrate Zoology: Entoprocta and LN 12

These flashcards cover key vocabulary and concepts related to the phyla Entoprocta and Cycliophora within the context of Invertebrate Zoology.

Platytrochozoa

A clade of invertebrates that includes several phyla without a shared body plan.

Acoelomate

An organism that does not have a body cavity.

Bilateral symmetry

A body plan in which the left and right sides are mirror images.

Through gut

A digestive tract that has two openings: a mouth and an anus.

Protonephridia

Simple excretory structures found in some invertebrates, used for osmoregulation.

Ciliates

Cells that have tiny hair-like structures (cilia) used for movement and feeding.

Simultaneous hermaphrodites

Organisms that have both male and female reproductive organs.

Cycliophora

A phylum of small, aquatic symbiotic organisms mostly found on the mouthparts of lobsters.

Commensal symbionts

Organisms that live on another species without harming it, often deriving benefits.

Gas exchange via diffusion

The process by which gas moves from an area of higher concentration to an area of lower concentration across the body surface.

Calyx

The cup-shaped body structure that is a characteristic feature of Entoprocta.

Trochophore larva

A type of larva that is typically free-swimming and has a band of cilia.

Indirect development

A life cycle that includes multiple stages, often with metamorphosis.

Ecdysozoa

A clade of animals that shed their exoskeletons to grow, including arthropods and nematodes.

Vertebrata

A subphylum within Chordata that includes animals with a backbone.

Nervous system with mini brain

A simple nervous system design in some invertebrates with a concentrated area of nerve cells.

Epidermal cells

Cells that form the outer layer of an organism and may have cilia for feeding.