SQUID DISSECTION Zoology SQUID DISSECTION PROCEDURES 1 Do

SQUID DISSECTION Zoology

SQUID DISSECTION PROCEDURES 1. ) Do not engage in horseplay! Common sense should rule here when working with sharp instruments. 2. ) Place the specimen to be dissected in the dissecting pan or tray. Never dissect while holding the specimen in your hand(s). 3. ) Wear safety goggles in case of chemical spills. 4. ) Point sharp objects or tools away from yourself and others.

SQUID DISSECTION PROCEDURES 5. ) Do not use excess force when working with a sharp instrument such as a scalpel. 6. ) Use dissecting scissors instead of a scalpel whenever possible. It tends to cut more efficiently for most work and is less dangerous to use. 7. ) Make certain to return your dissection tools to their appropriate container. Care for and dispose of your dissection in accordance with the directions given by your instructor. 8. ) Obviously one should not eat or drink in a laboratory where a dissection is occurring.

CLEANING OF PANS, TOOLS AND TABLE All pans, tables and dissecting tools should be wiped clean with a Clorox wipe and returned to the appropriate area. Students may go the restroom after all clean up and with permission from the instructor to wash hands.

DIRECTIONAL TERMS Anterior—the head end Posterior—the tail end Ventral—the belly of an animal Dorsal—the back of an animal

EXTERNAL ANATOMY Things I must know for my squid practical: � Aquaferous � Anus � Arms � Mouth � Fin � Beak � Tentacles � Suckers � Mantle � Head � Eye � Mantle � siphon collar pore

EXTERNAL ANATOMY

INTERNAL ANATOMY Heart Stomach Intestine Rectum Gills Liver Kidney Ovary/testes Ink sac Cecum

INTERNAL DISSECTION 1. orient squid on its posterior face. 2. above the siphon, using scissors, cut into the mantle (all the way up to the top where the fins meet) 3. open the mantle and carefully scrape away any membranes that are clinging to the body wall 4. IF you have female you will see nidamental glands in the body cavity. Remove carefully! 5. identify internal structures……

NIDAMENTAL GLAND IN FEMALES

INTERNAL ANATOMY