1. Chapter #8
Insects
Crayfish

2. Chapter 8.1 Notes
Jointed-leg animal is an invertebrate with an exoskeleton, bilateral symmetry, and jointed appendages.
Appendage is a structure that grows out of an animals body. Examples legs, wings, antennae.
80% of animals are jointed-leg animals.

3. Molting- the shedding of the exoskeleton.
Antennae- appendages of the head that are used for sensing smell and touch.
Compound eyes- eyes with many lenses.
Simple eyes- eyes with only 1 lens.

4. 5 classes of jointed-leg animals
Crayfish, lobsters, crabs, pill bugs.
5 pairs of legs, compound eyes, antennae, 2 body sections Head-thorax and abdomen
Spiders, scorpions, ticks.
4 pairs of legs, simple eyes, 2 body sections.
Centipedes
1 pair of legs per section, have poison claws, eat insects.

5. Millipedes.
2 pairs of legs per segment, no claws, eat plants.
Insects- are the only invertebrate that can fly!!!
3 body parts, 2 compound eyes and 3 simple eyes, 1 pair antennae, 3 pairs of legs, 2 pairs of wings.

6. Spiny-skin animals
Are invertebrates with 5-part body design, radial symmetry, and spines.
Examples starfish, sand dollars, sea urchin. Found only in Oceans.
Tube feet- like suction cups that help starfish move, eat, attach to rocks.
Can regenerate parts.

7. Chapter 8.2 Notes
Vertebrates are the most complex organisms in the animal kingdom.
Chordate is an animal at sometime in its life, has a tough, flexible cord along its back.
Endoskeleton-skeleton inside the body.

8. 7 Classes of Chordates
Jawless fish- Cold-blooded (exothermic) Have gills, have no jaws, no scales, skeleton made of cartilage. Example Lamprey (Parasite)
Cartilage fish- skeleton made of cartilage. Have jaws, tooth like scales, paired fins. Examples sharks and rays.
Bony fish- skeleton made of bone. Gill cover (Operculum), swim bladder, scales, slime.

9. Amphibians- are animals that live part of their life on land and the other part in the water. Tadpoles (young). Can breathe through gills (young), lungs, skin. Cold-blooded. Examples frogs, toads, salamanders.
Hibernation being inactive during cold weather.
Estivation being inactive during warm weather.

10. Reptiles- are animals that have dry scaly skin, and can live on land
Reptiles- are animals that have dry scaly skin, and can live on land. Cold-blooded, lay leathery eggs. Examples are snakes, lizards, turtles, crocodiles, and alligators.
Birds- are warm-blooded (endothermic). Have wings, beaks, 2 legs, feathers, scales on their legs, hollow bones.
Mammals-animals with hair that feeds milk to its young. Warm-blooded, have mammary glands, give live birth, care for young. Pouched-kangaroos and opossums. Egg-laying-duck billed platypus and spiny anteater. Placental- humans, dogs, cats...almost all other mammals.

11. “Crayfish”. April 9, 2007. http://www. biol. andrews
“Insects”. April 9,