Invertebrates Flashcards
Animals without Backbones
Invertebrate
An outer covering that provides support.
Exoskeleton
An internal skeleton
Endoskeleton
An animal with a Backbone
Vertebrate
Animals that can produce both sperm and eggs.
Hermaphrodite
The combining of egg and sperm inside the animal.
Internal fertilization
Egg and sperm combine outside the body.
External fertilization
Can be divided along any plane
Radial symmetry
Can be divided into a mirror image
Bilateral symmetry
The tendency to concentrate nervous tissue and sensory organs at the anterior end of the animal
Cephalization
Fluid-filled cavity with organs
Coelom
a fluid-filled cavity that develops between the mesoderm and the endoderm.
Pseudocoelom
Animals that do not have a coelom
Acoelomate
Mouth develops first
Protostome
Anal Cavity develops first
Deuterostome
Attached to and stay in one place.
Sessile
Stinging Cells
Cnidocytes
A group of nerve cell bodies that coordinates incoming and outgoing nerve signals
Ganglion
When body parts that are missing can grow back.
Regeneration
The fluid within a closed space that provides rigid support for muscles to work against.
Hydrostatic skeleton
A disease that can be contracted by eating raw or undercooked pork.
Trichinosis
Blood is pumped out of vessels into open spaces surrounding the body organs
Open circulatory system
Blood is confined to vessels as it moves through the body
Closed circulatory system
Storage place for food until it goes to the Gizzard
Crop
