UNIT 3 Bio 11 Phylum Cnidaria

What trait first appeared in Phylum Cnidaria?

Tissues

What class do jelly fish belong to

Class Scyphozoa

What class do sea anemones and corals belong to

Class Anthozoa

What is the importance of having tissues? 

it allows for the organisim to have organs and specialized structures such as body cavities

What are three things the Gastrovascular system does

does the job of the digestive system,circulatory system,and the excretatory system.

Do animals without formal organ systems still need to do the job of those systems?  

yes through less specialized systems

do Cnidarian have an anus

no they use samw hole for eating and excreeting

Explain Gas exchange

oxygen enters and carbon dioxide leaves through simple diffusion.

Explain simple diffusion

high concentration of particles on outside of the cell move through the cell membrane until it reaches equilibrium

Describe the nervous system of Cnidarians  

They have a nerve net that acts as a simple nervous system

is the nerve net centrallized?

no it is spread out all over the body

What is the nerve net made out of

neurons

what is the importance of corrals

Protects coastlines from waves and storms, provides habitats for animals, corrals provide nitrogen for the ecosystem

What is corral bleaching

When corral is under stress it expells its alge this make the coral apear bleached if the stress is not reduced corrals can die