Invertebrates

Paige and Dana

This is Paige's and Dana's notes about Invertebrates

Sponges

Here are some notes on sponges.


- reproduce asexually

- can't move once they attach as adults

- gets food from the water around it ( it's environment)

- between inner and outer layer there is a jelly like layer

- grows at almost any depth

- grow on hard surfaces

- there are 5000 known kinds of sponges

Cnidarians

Some notes on Cnidarians are...

- they can sting their pray to get food.

- they are meat eaters only

- they have special cells in their tentacles that sting and paralyze their pray so they can eat.

- they have tentacles to protect themselves from other animals

- they are symmetrical

- they reproduce sexually and asexually

Flatworms

Some notes on Flatworms are...


- They're bilateral symmetrical

- they have a flat body hence the name Flatworm

- they have eyes on the top of their head

- Under a microscope they look cross-eyed

-They are very tiny

-They stay out of the light


Roundworms

Has a round body

Is a parasite

The round worm is very small

Has a distive system with two openings

Has a nervesystem

Reproduce sexually

They live in other things to feed


Segmented worms

Has a heart a brain, a nerve cord, a crop and a gizzard

They breathe though little holes in its body

They have two sets of mucesles

They reproduce sexually


Arthropods

Crustaceans -

arachnids - creatures with eight legs

Insects - insects with two legs

Has a jointed exoskeleton

It mauls to grow

Has a large claw for defence



Mollusks

Mollusk - largest group of inverabrates

Example: snails, octopus sea snail, etc


Characteristics

Has shells

Can live in water or on land

Has a full digestive system

Reproduce sexually

Some can spray black ink


Echinoderms

Echinoderms - are invertebrates that have internal skeletons and spines sticking out from their bodies

examples: starfish, sand dollars, sea urchins, sea cucumbers


Characteristics

Interval skeletons and spines

live only in the ocean

get oxygen from seawater

most adults appear to have radial symmetry

spiny skin

endoskeleton

no head or brain

tube feet


Adaptation - Mouth is at the center of underside with powerful jaws and hidden among their spines and poison glands. They also have tube feet for moving, feeding and sensing respiration


Thank You so much for reading our information on Invertebrates

Have a nice day :)