Science Chapter 1 Lesson 3

Created by kjones12345 

Upgrade to
remove ads

verebrate

An animal with a segmented backbone.

chordates

Animals with nerve chords running down their backs.

endoskeletons

inner skeletons

bone and cartilage

endoskeletons are made of this.

bony fish

Examples are trout, salmon, tuna, goldfish. They have hard, bony skeletons and breathe through gills.

cartilage

Rays, skates and this sliky shark have skeletons made of these.

birds

They have jaws, feathers and hard, bony skeletons. They breathe through lungs.

reptiles

They have jaws, scales and hard bony skeletons.

examples of reptiles

snales, turtles, alligators and lizards.

mammals

They breathe through lungs and feed their young on mother's milk. Most live on land.

examples of mammals

humans, dogs, horses and whales.

tetrapods

Animals with four feet

bipeds

Animals with two feet.

invertebrates

animals without backbones

More than 95 of animals are these

invertebrates

arthropods

An invertabrate that has an external skeleton, a segmented body, and jointed appendages. Examples are insects, spiders, crab and shrimps.

flat and round worms

they live in water, in damp soil or inside other animals.

cnidarians

Examples are jellyfish, hydras and corals

Sponges

these belong to a phylum called Porifera.

Echinoderms

Examples are sea stars and sea urchins.

mollusks

examples are clams, snails, oysters, squid and scallops.

arthropods

these are invertebrates with tough exoskeletons

exoskeletons

tough outer skeletons cover the organisms bodies and protect the animals from danger.

crustaceans, insects and arachnids

groups of arthropods

crabs, shrimp and lobsters

examples of crustaceans

crustaceans

most abundant animals in the ocean, there are more than 30,000 species.

insects

largest group of arthropods.

insect body

these consists of a head, thorax and abdomen.

antennae and eyes

these help an insect sense the environment.

arachnids

there include spiders, ticks, scorpions and mites.

these have four pairs of appendages, one or two body sections and no antennae

arachnids

spiders

predators that feed mainly on insects.

parts of arthropods

abdomen, jointed legs, thorax, antennae and head

largest animals on earth

there are in the vertebrate class, not invertebrates.

These have stinging cells to capture fish

cnidarians

segmented worms

these have bodies separated into compartments.

Classes of vertebrates

reptiles, amphibians, birds and mammals.

jawless fish

these have soft skeletons and gills. specials include the hagfish and lamprey

lesson main idea

animals are classified according to whether or not they have backbones.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set