1. CRAYFISH DISSECTION

2. INTEGUMENTARY/SKELETAL
EXOSKELETON
CARAPACE (EXOSKELETON THAT COVERS CEPHALOTHORAX)
MOLTING

3. RESPIRATORY SYSTEM

4. RESPIRATORY SYSTEM PRINCIPLE OF DIFFUSION
GOING FROM AN AREA OF HIGH CONCENTRATION TO LOW CONCENTRATION

5. CIRCULATORY SYSTEM

6. CIRCULATORY SYSTEM
FUNCTION: TO CARRY OXYGEN TO THE TISSUES AND CARRY CELLULAR WASTE AND CARBON DIOXIDE AWAY.
OPEN CIRCULATORY SYSTEM: NO VEINS HERE!!!!!!!!!!!!!!!!!

7. CIRCULATORY SYSTEM

8. DIGESTIVE SYSTEM

9. DIGESTIVE SYSTEM MOUTH--------ESOPHAGUS------
CARDIAC STOMACH PYLORIC STOMACH INTESTINE---ANUS
ENZYMES PRODUCED BY DIGESTIVE GLAND.
ABSORBED BY DIGESTIVE GLAND

10. DIGESTIVE SYSTEM
TAKE STOMACH OUT AND LOOK AT TEETH INSIDE THE CARDIAC STOMACH.
CALLED THE GASTRIC MILL

11. REPRODUCTIVE SYTEM MALE? LOOK FOR TESTES UNDERNEATH THE HEART.
BE CAREFUL THEY ARE SMALL!
FEMALE? LOOK FOR OVARIES UNDERNEATH THE HEART.

12. REPRODUCTIVE SYSTEM DO YOU HAVE A MALE OR A FEMALE?
LOOK AT BASE OF 5TH WALKING LEG FOR MALES.
LOOK AT BASE OF 3RD WALKING LEG FOR FEMALES.

13. REPRODUCTIVE SYSTEM
MALES TRANSFER SPERM BY SWIMMERETS TO FEMALE’S SEMINAL RECEPTACLE.
FIND THIS ANTERIOR TO FIRST PAIR OF SWIMMERETS.

14. REPRODUCTIVE SYSTEM FEMALES HOLD SPERM ALL WINTER.
RELEASE EGGS AND SPERM DURING SPRING.
EXTERNAL FERTILIZATION.

15. REPRODUCTIVE SYSTEM

16. REPRODUCTIVE SYSTEM

17. EXCRETORY SYSTEM

18. EXCRETORY SYSTEM GETTING RID OF EXCESS WATER
LIVE IN HYPOTONIC ENVIRONMENT
GETTING RID OF NITROGEN WASTE
EXITS THROUGH PORE AT BASE OF ANTENNAE

19. NERVOUS SYSTEM

20. NERVOUS SYSTEM BRAIN (GANGLIA) NERVE CORDS ENCIRCLE ESOPHAGUS
VENTRAL NERVE CORD
GANGLIA CONTROL EACH SEGMENT

21. MUSCULAR SYSTEM ADDUCTOR MUSCLES TO MOVE MANDIBLE.
MUSCLES INSIDE CHELIPED
FLEXOR/EXTENSOR MUSCLES OF ABDOMEN

22. MUSCULAR SYSTEM

23. PARTS YOU SHOULD KNOW ANTERIOR POSTERIOR VENTRAL DORSAL
CEPHALOTHORAX ABDOMEN
CARAPACE EXOSKELETON
CHELIPED ROSTRUM
COMPOUND EYES ANTENNAE
ANTENNULES WALKING LEGS

24. PARTS YOU SHOULD KNOW SWIMMERETS TELSON UROPODS MANDIBLE
MAXILLAE MAXILLIPEDS
MALE/FEMALE GILLS
SEMINAL RECEPTACLE NAUPLIUS
TESTES OVARIES
HEART OSTIA

25. PARTS YOU SHOULD KNOW ARTERIES PYLORIC STOMACH
CARDIAC STOMACH INTESTINE
DIGESTIVE GLAND GREEN GLANDS
ADDUCTOR MUSCLES
ABDOMINAL MUSCLES
VENTRAL NERVE CORD
GASTRIC MILL