SEAN KENT
Home
Photography
Landscapes
Nature
>
Otters at Trowel Shop Pond
Photography
Around Town
Looking Closely Blog
About Me
Key Characteristics of Arthropods
Exoskeleton
Composed of protein, lipids,
chitin
, and usually calcium carbonate
Jointed appendages
One pair of jointed appendages for each segment
Bilateral symmetry
Head, Thorax, and Abdomen; or Cephalothorax and Abdomen
Complex muscular system
Hemocoel for a body cavity
Open circulatory system
Complex digestive system
Respiratory system
Gills, trachea, or book lungs
Complex nervous system
Dorsal brain; ventral nerve cord
Molting (i.e. growth with ecdysis)
Crayfish Dissection
Crayfish structures that you need to know
External:
2 pairs of antennae
Exoskeleton
Mouth
Mandibles
Maxilla
Cephalothroax
Carapace
Compound eyes
Swimmerets (Pleopods)
Uropod
Telson
Internal Anatomy
Gills
Stomach
Gonads
Heart
Esophagus
Digestive gland
Green glands (excretory)
Ventral ganglia
Brain
Home
Photography
Landscapes
Nature
>
Otters at Trowel Shop Pond
Photography
Around Town
Looking Closely Blog
About Me