Arthropod Lab
and integumentary system
Crayfish (Austropotamobius pallipes)
An arthropod is an invertebrate animal having an exoskeleton, a segmented body, and jointed appendages. Crayfish may grow to 12 cm (5 inches) long, although sizes below 10 cm are more common. It typically lives in rivers and streams about 1 meter deep, where it hides among rocks and submerged logs, emerging to forage for food, and also in lakes.
Taxonomy and Evolution
- Kingdom - Animalia
- Phylum - Crustacea
- Class - Malacostraca
- Order - Decapoda
- Family - Astacidae
- Genus - Austropotamobius
The Crayfish swims in rivers typically 1 meter deep. They hide among rocks and submerged logs, coming out only to forage for food.
Crayfish Locations
Observation Photos
Crayfish Diagram
Grasshopper Diagram
Internal Crayfish Diagram
Integumentary System
Eucoelomates; Coelom is divided into compartments;
Body is segmented with jointed appendages;
Cephalization (has a head with cerebral ganglia)
Crustaceans are only arthropods with 2 pairs of antenna
long antenna: touch & taste;
short antennules: touch, taste and equilibrium;
decapod = 10 pair of legs (8 walking legs & 2 chelipeds)
exoskeleton made of chitin and proteins and lipids