Invertebrates Of Kingdom Animalia Chap. #11 Flashcards
What is an Invertebrate?
Animals that lack a backbone.
What is a vertebrate?
Animals that possess a backbone.
What is Spherical symmetry?
An organism possesses spherical symmetry if can be cut into two identical halves by any cut that runs to the organism’s center.
What is radial symmetry?
An organism possesses radial symmetry if it can be cut into two identical halves by any longitudinal cut through it’s center.
What is bilateral symmetry?
In organism possesses bilateral symmetry if it can only be cut into two identical halves by a single longitudinal cut along with center which divides it into right and left halves.
What is an epidermis?
And outer layer of cells designed to provide protection.
What is a mesenchyme?
The jellylike substance that separates the epidermis from the inner cells in a sponge.
What are collar cells?
Flagellated cells that push water through a sponge.
What are amebocytes?
Cells that move using pseudopods and perform different functions in different animals.
What is a Gemmule?
A cluster of cells encased in a hard, spicule-reinforced shell.
What is a Polyp?
The sessile, tubular form of a cnidarian with a mouth and tentacles at one end and a basal disk at the other.
What is a Medusa?
A free-swimmimng cnidarian with a bell-shaped body and tentacles.
What is a Mesoglea?
The jellylike substance that separates the epithelial cells in a cnidarian.
What is a Epithelium?
Animal tissue consisting of one or more layers of cells that have only one free surface, because the other surface adheres to a membrane or other substance.
What is Nematocysts?
Small capsules that contain a toxin which is injected into prey or predators.
What are Testes?
Organs that produce sperm.
What are Ovaries?
Organs that produce eggs.
What is the anterior end?
The end of an animal that contains its head.
What is the posterior end?
The end of an animal that contains its tail.
What is the Circulatory system?
A system designed transport food and other necessary substances throughout a creature’s body.
What is the nervous system?
A system of sensitive cells that respond to stimuli such as sound, touch, and taste.
What is a Ganglia?
Masses of nerve cell bodies.
What does hermaphroditic mean?
Possessing both male and female reproductive organs.
What are the seminal vesicles?
Organs that carry the worm’s sperm.
What are seminal receptacles?
Organs in a worm’s body that are used to hold other worms sperm.
What is a mantle?
A sheath of tissue that encloses the vital organs of a mollusk, makes the mollusk’s shell, and performs respiration.
What is a shell?
A tough, multilayered structure secreted by the mantle, general used for protection, but sometimes for body support.
What is a Visceral Hump?
A hump that contains a mollusk’s heart, digestive, and excretory organs.
What is a foot?
A muscular organ that is used for locomotion and takes a variety of forms depending on the animal.
What is a Univalve?
An organism with a single shell.
What is a Radula?
An organ covered with teeth that mollusks use to scrape food into their mouths.
What is a Bivalve?
an organism with two shells.
