I and V
Animals that lack a backbone
Invertebreates
End of animal containing the tail
posterior
Was the ventral side of our worms lighter or darker in color?
What are sponges often mistaken for?
Plants
All arthropods have?...name all four.
exoskeleton
body segmentation
ventral nervous system
open circulatory system
Insecta is the largest or smallest class in creation?
Largest
Worms and insects.
What do sea lilies and feather stars use to catch floating plankton?
their tube feet located on their feather arms
The space between the body wall and the intestine in a worm is called?
The body cavity.
Do bettles have small or large appetites?
Large/voracious
In the crayfish, what are the functions of the antennae?
provides a strong sense of taste and touch
What other uses do insects have for their legs besides walking?
praying mantis-can be a powerful claw used to capture it's prey
-make sound
-store food
An organism that can be cut into two identical halves is what type of symmetry?
spherical
According to the Invertebrates part 1 chapter, define Epidermis
Outer layer of cells designed to provide protection
During the dissection near the posterior end of your cut and moving the intestine aside, what should you see?
Ventral blood vessel
The sea aneomone has a symbiotic relationship with?
The clownfish.
Define exoskeleton
a body covering, typically made of chitin, that provides support and protection
Describe how insects get oxygen.
they don't have a "respiratory system," they do have tracheas that are tubes connected to the outside through a searies of small holes called spiracles. The complex network of trachea causes air to run thoughout the body providing oxygen to all tissues
The end of the animal that contains the head.
Anterior
What organisms are very tiny polyps that live in a self-made stonelike structure?
Corals
We saw the incredibly small mandibles in our crayfish, how do they function differently from humans mandibles? (found in lab procedure)
The open and close horizontially
What are the three groups mollusks are divided into?
Gastropods
Bivalves
Cephalopods
Describe chitin (kye'tin)
a chemical substance that is both tough and flexible with a mineral substance that makes it hard in an anthropod
What is a proboscis and it's function?
Buttlerfly mouth designed to siphon nector
What is cephalization? (sef uh lih zay shun)
The concentration of sense organs and nerves in the head of an animal
Small capsules that contain a toxin that is injected into prey or predators released from tentacles?
Nematocysts
What do we learn from dissecting an earthworm?
Basic anatomy
Simplicity of its organs
How many modes of reproduction do sponges have?
Four (page 523 ed.3)
How is an anthropod's circulatory system different from a vertebrate's?
they allow direct contact between the tissues and the blood. The blood stays in the blood vessel for only part of the time then it is dumped into the tissues bathing them with the substances they need
What animals have water vascular system?
echinoderms