Lab 11 - Click Arrow

Q: What are ecdysozoans?
A: Animals that grow by molting their exoskeleton.

Q: What is the exoskeleton for?
A: Support and protection.

Metamorphosis

Q: What is incomplete metamorphosis?
A: Juveniles look like adults but are smaller and not sexually mature.

Q: What is complete metamorphosis?
A: Juveniles change completely into adults (e.g., caterpillar to butterfly).

Nematodes

Q: What are nematodes?
A: Small, unsegmented worms with a complete digestive tract.

Q: Where do nematodes live?
A: Soil, water, or as parasites.

Arthropods

Q: What is the arthropod exoskeleton made of?
A: Chitin.

Q: What are arthropod body segments called?
A: Tagmata.

Arthropod Subphyla

Q: What are Chelicerata?
A: Spiders, scorpions, ticks, etc., with fangs and pedipalps.

Q: What are Myriapoda?
A: Centipedes (carnivorous) and millipedes (feed on dead matter).

Q: What are Crustacea?
A: Lobsters, crayfish, shrimp, etc., with two pairs of antennae.

Q: What are Insects?
A: Arthropods with three body parts (head, thorax, abdomen) and six legs.

Crayfish Dissection: External

Q: What does the cephalothorax do?
A: Protects the organs.

Q: What do the antennae do?
A: Sense the environment.

Crayfish Dissection: Internal

Q: What does the stomach do?
A: Breaks down food.

Q: What do the gills do?
A: Help with breathing.

Q: What does the heart do?
A: Pumps blood.

Q: What are green glands for?
A: Remove waste.

Q: What do swimmerets do?
A: Help in swimming and reproduction.