Survey of the Animal Kingdom - Phyla Annelida and Nematoda

These flashcards cover key vocabulary and concepts related to the Phyla Annelida and Nematoda as discussed in the lecture.

Phylum Annelida

Segmented worms including earthworms and leeches, characterized by a coelomate body plan and segmentation.

Coelomate

An organism with a true coelom, a body cavity completely lined with mesodermal tissue.

Pseudocoelomate

An organism that has a body cavity known as a pseudocoelom, which is not entirely lined by mesoderm.

Ecdysis

The process of molting or shedding the outer covering, characteristic of Nematoda and arthropods.

Setae

Small, bristle-like appendages found on annelids, serving various functions such as anchoring during locomotion.

Trochophore

A free-living larval stage in some protostomes, notably in annelids and mollusks.

Clitellum

A thickened, glandular section of the body wall in annelids, important for reproduction.

Nematoda

A phylum of unsegmented worms known as roundworms, which include significant parasites.

Species richness of Phylum Annelida

Includes over 20,000 named species, such as earthworms and polychaetes.

Trichinella spiralis

A parasitic roundworm that causes trichinosis in humans, often contracted through undercooked pork.

Ascaris lumbricoides

A common human intestinal roundworm that can cause significant health issues.

Hirudinea

A class of annelids commonly known as leeches, primarily found in freshwater.

Polychaeta

A class of annelids that are primarily marine and have many bristles, known for their parapodia.

Digestive tract components in Annelida

Includes pharynx, esophagus, crop, gizzard, and intestine, each specialized for specific functions.

Heartworms

Parasites transmitted by mosquitoes that reside in the heart and lungs of dogs and cats.

Pinworms

Intestinal parasites that commonly infect children, leading to irritation and reinfection through scratching.