Atlas of Animal Anatomy and Histology
Crustaceans (Crustacea)
Dorsal view of a crayfish
Front view of the head region of a crayfish
Structures and appendages on the cephalothorax of a crayfish
Side view of the head region of a crayfish
Ventral view of the head region of a crayfish
Appendages surrounding the mouth of a crayfish
The first walking leg, the cheliped ends in an enlarged claw
The dorsal view of uropods and telson, which together make up the tail fan
Ventral view of the walking legs and swimmerets of a female crayfish
Ventral view of the walking legs, swimmerets and modified copulatory appendages of a male crayfish
Dashed lines indicating cuts for removal of the dorsal carapace
Side view of the branchial chamber of a crayfish after the removal of the branchiostegit
Arrows show direction of water circulation in the branchial chamber by the action of the gill bailer
Position of the gill bailer (scaphognathite) and the direction of water circulation (blue arrows) by its action
Separated foot gills and joint gills of a crayfish
Careful removal of the centre portion of the carapace with forceps
Position of the heart after the removal of the centre part of carapace
The heart, digestive gland, and the gastric mill as exposed by the removal of the carapace
Dashed lines indicating the cutlines to remove terga of the abdomen
Internal organs of the crayfish after removal of the carapace and abdominal terga
The heart and the main arteries
The heart and the main arteries injected with toluidine blue
Internal reproductive organs of a female crayfish
Internal reproductive organs of a male crayfish
End part of the abdomen of a crayfish in dorsal view
Histological cross section of the tubules in the digestive gland of the crayfish (HE)
The gastric mill, the mid-gut and the digestive glands under water cover
The cardiac part of the gastric mill cut on the dorsal side with the mastax under water cover
Mid-gut is bridged over by the funnel transporting coarse food particles directly into the hind-gut
The mid-gut of a crayfish is very short
Close-up of the hind-gut with blue coloured cuticular ridges
Ventral view of the tail fan of a crayfish
The green glands (excretory organs) and the apodeme after the removal of viscera
The nervous system (ventral nerve cord) of a crayfish
Crayfish and insect facets of the compound eye (400x)
The statocysts on the dorsal side of the basal segments of antennules