Worms! Flashcards
(26 cards)
What is an Invertebrate?
a multicellular, heterotrophic organism that does not have a backbone.
What is a Hydrostatic Skeleton?
It is a fluid-filled compartment in the body
What is Diffusion?
The movement of a substance from a high area to a low area of concentration
What is the meaning of free living?
A following of life which one chooses to live freely
What is a Septum?
A septum is a wall dividing a wall. The structure is sheet-like
What are Oligochaetes?
Oligochaetes are animals that are aquatic and terrestrial worms
What is the characteristic of lacking coelom, a fluid-filled body cavity?
Acolomates.
Mouth before the anus. When an animal’s mouth is formed from the blastophore.
Protostome.
What is the Scolex of a Tapeworm?
It is the mouth. It is where the bearings are located to hook onto hosts so it can suck food.
The cavity is partially lined with tissues derived from the mesoderm and is called a “false coelom”.
Pseudocolem.
A phylum of worms with cylindrical and unsegmented bodies.
Nematoda.
What are Annelids?
are worms with segmented bodies. They have a true coelom that is lined with tissue derived from mesoderm.
An animal that relies on other animals for nutrients.
Parasitic
What are tapeworms?
long, parasitic, flatworms that live inside the intestines of their hosts.
The organ system of nematodes and annelids that allows food to pass through mouth and anus.
Digestive Tract
What are acoelomates?
an animal that lacks a coelom (fluid-filled body cavity that separates the body wall and digestive tract).
What is the gastrovascular cavity?
the digestive system with a single opening that functions as circulation, body support, waste-disposal, and digestion.
What are Platyhelminthes?
soft, flattened worms that have tissues, gastrovascular cavity, bilateral symmetry, and move with cilia - also known as flatworms
What are larvae?
The younger form of an animal.
What are Hirudinea?
Annelids that are often shorter in length. They are external parasites that suck the blood from different animals.
What are Polychaetes?
Annelids that live in the ocean. There are many different types of polychaetes. Some have bristles called setae. Some have jaws that they use for catching prey.
An organism that receives parasites
Hosts
Flame cells remove excess water and waste from the body.
Excretion
The concentration of sense organs and never cells at the front end of the body.
Cephalization
