CRAYFISH DISSECTION.

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Presentation transcript:

CRAYFISH DISSECTION

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

RESPIRATORY SYSTEM

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

CIRCULATORY SYSTEM

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

CIRCULATORY SYSTEM

DIGESTIVE SYSTEM

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

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

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

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.

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

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

REPRODUCTIVE SYSTEM

REPRODUCTIVE SYSTEM

EXCRETORY SYSTEM

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

NERVOUS SYSTEM

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

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

MUSCULAR SYSTEM

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

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

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