This describes an organism that remains attached to a surface for its entire life - it does not move
collar cells / choanocytes
Specialized cells with flagellum that create a current to bring water and food into the body of a sponge for filter feeding
A large opening on a sponge through which filtered water is expelled
An organism that has both the male and the female reproductive organs
An animal that lacks a backbone
Small harpoon-like structures that when triggered can inject a toxin / venom into prey or predators. Found in Cnidarians for feeding or defense. These are the stinging cells
The free-swimming, ciliated larva of a Cnidarian - allows for movement to new areas.
Glass-like structures found in the sponge that give support and structure. They act like a primitive skeleton
A cell that can move around the body of the sponge to make the spicules and transport nutrients and wastes. Also, secretes chemicals to make the sponge taste bad.
An organism that must consume food - eat
Animals that do not have a body cavity. The three tissue layers (ectoderm, mesoderm and endoderm) are all packed together with no space.
Animals that do have a true body cavity. There is a space between the mesoderm and ectoderm
A multi-layered membrane that protects and holds the organs in place
Animals that have a false body cavity. There is a fluid filled area between the mesoderm and ectoderm
An inner tissue layer
A middle tissue layer
An outer tissue layer
A jelly-like layer found in Cnidarians but it is NOT a true tissue layer
A concentration of nerve tissue at the anterior end of the animal - start of the brain
Refers to how the body plan of an animal is organized and arranged
A body plan in which a single, imaginary line can divide the body into two equal halves - the left side and the right side; characteristic of Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, and Chordata
A body plan in which the body parts repeat around a central point or axis of the body; characteristic of Cnidarians and Echinoderms
A body plan in which the animal lacks symmetry and has an irregular shape; characteristic of Porifera (sponges)
An area in animals that acts as a separate area for digestion. Like a primitive stomach. Food is digested here.
An organism that feeds off of another living organism
tegument / cuticle
The outer tissue layer of a tapeworm that prevents it from being digested by its host
Having a body that is separated into parts such as we see in Annelida
The head of a tapeworm, which has hooks and suckers to adhere to the host tissues
The detachable sections of a tapeworm that has male and female reproductive organs; breaks off when its eggs are fertilized and passes out of the host's intestine. The tapeworm can fold over on itself and self fertilize by mating between two proglottids
Bristles on the ventral / underside of the tapeworm that are used for traction
The rhythmic muscle contraction
A collection of nerve cells
Area of earthworm where mating occurs and it secretes a cocoon around the fertilized eggs
A grinding organ found in the earthworm
A storage area for food waiting to enter the gizzard of an earthworm
Excretory organs that act like kidneys removing the waste from blood
The passage between the pharynx and the crop in the earthworm - moves food along
Muscular part that pushes food to the esophagus of the earthworm and allows it to get some oxygen
A dormant stage of a worm which has the baby worm encased in a thick protective coat awaiting to reach its proper host. Can be found in the muscle tissue of an intermediate host
The back of the animal
The belly or underside of the animal
The tail end of the animal
The head end of the animal
An animal with a backbone
A consumer that obtains energy by eating only animals.
A consumer that obtains energy by eating only plants.
A consumer that obtains energy by eating both plants and animals.
A tough, flexible, cartilaginous rod that runs along the back of chordates providing support. It protects the nerve cord.