Human Intestinal Roundworm and Panarthropoda Review

These flashcards cover key vocabulary and concepts related to human intestinal roundworms and various arthropods, aiding in the understanding of their anatomy, reproduction, and classifications.

Dimorphic

Referring to species in which males and females exhibit different physical characteristics.

Dioecious

Organisms that have distinct male and female individuals.

Testes

Male reproductive organs that produce sperm.

Ovaries

Female reproductive organs that produce eggs.

Parthenogenesis

A form of asexual reproduction where the female can produce offspring without fertilization.

Tardigrada

Also known as water bears, small organisms with a cuticle made of chitin.

Chitin

A biopolymer that forms the exoskeleton of arthropods and the cuticle of some other animals.

Hemolymph

The fluid that circulates throughout the body of arthropods, similar to blood.

Open circulatory system

A type of circulatory system where blood is not always contained within blood vessels.

Cephalothorax

A body region that combines the head and thorax, found in some arthropods.

Maxillae

Appendages in crustaceans and insects used for manipulating food.

Mandibles

Jaw-like appendages used for biting and grinding food in arthropods.

Echinodermata

A phylum of marine animals that includes starfish, sea urchins, and sea cucumbers.

Water vascular system

A network of fluid-filled canals in echinoderms used for locomotion and food acquisition.

Bilateral symmetry

A characteristic of animals that can be divided into two identical halves along one axis.

Pentaradial symmetry

A body plan with five or more radiating sections; typical in adult echinoderms.

Regeneration

The ability to regrow lost body parts.

Hexapoda

A subphylum of arthropods that includes insects, characterized by three pairs of legs.

Spiracles

Small openings on the bodies of insects for gas exchange.