Invertebrates

Sponges, Echinoderm, Mollusks, And Arthropods- Nicole

Mollusks

Mollusk - an animal witha soft body and no bones

Example: slugs


Characteristics

Shells grow with in their body's

Has a heart

Has a mantle

Has a siphons

Has muscles

Has a foot

Has a stomach

Has a mouth

Has intestine

Has gills

Has a kidney

Reproduce sexually


Adaptations - has a shells to protect its body and provides support. Jet like motion.


Name two characteristics of snails?

Has a heart

Has a brain


Sponges

Sponge - one type of animal that filters the water it lives in to get food.

Example - Venus-Flower Basket


Characteristics

Reproduce asexually

Can't move once they attach as adults

­ gets food from environment around it.

­ between inner and outer layer there is a jelly­like layer ­ grow at almost any depth

­ grow on hard surfaces

­ shaped like fingers, tree branches or round

­ filters water to get its food

­ 5000 known species

­no real digestive system

Adaptation ­ body is a network of tiny pores and canals that allow water to filter through to obtain food because they don’t move.


Adaptation - - body is a network of tiny pores and canals that allow water to filter through to obtain food because they don’t move


Why is a sponge classified as an animal? It takes in food and has moving whip-like structures


Arthropods

arthropod - an animal that has a jointed exoskeleton, and jointed limbs

Crustaceans - one kind of arthropod

arachnids - an arthropod with eight legs and no antennae, such has a spider, scorpion, tick, or mite

Insects - an arthropod with six legs jointed legs, such as a grasshopper.


Characteristics

Has a circulatory system

Reproduce sexually

Has a brain

Has legs


Adaptations

Hard skeleton enables it to protect it self



Name two characteristics arthropods share. -

Has a brain

Jointed exoskeleton


Echinoderms

Echinoderms - an invertebrate that has an internal skeleton and spines that are part of its skin

examples: sea urchins


Characteristics

Internal skeletons

Live in ocean only

Powerful jaws

Has a mouth

No brain

Nerves that are able to move and feed

Radial symmetry



Adaptation -

The mouth of an echinoderon is at the center of the underside of its body. Many echinoderon have powerful jaws and, hidden among their spines, poison glands.


In what ways are echinoderms different from other invertebrates?

They have spines sticking out from their body's