crayfish dissection - local.brookings.k12.sd.us
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Transcript crayfish dissection - local.brookings.k12.sd.us
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
VENTRAL
CEPHALOTHORAX
CARAPACE
CHELIPED
COMPOUND EYES
ANTENNULES
POSTERIOR
DORSAL
ABDOMEN
EXOSKELETON
ROSTRUM
ANTENNAE
WALKING LEGS
PARTS YOU SHOULD KNOW
SWIMMERETS
UROPODS
MAXILLAE
MALE/FEMALE
SEMINAL RECEPTACLE
TESTES
HEART
TELSON
MANDIBLE
MAXILLIPEDS
GILLS
NAUPLIUS
OVARIES
OSTIA
PARTS YOU SHOULD KNOW
ARTERIES
PYLORIC STOMACH
CARDIAC STOMACH INTESTINE
DIGESTIVE GLAND GREEN GLANDS
ADDUCTOR MUSCLES
ABDOMINAL MUSCLES
VENTRAL NERVE CORD
GASTRIC MILL