Arthropod Lab

and integumentary system

Big image

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

Big image

Observation Photos

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