Frog Dissection PreLab Notes Purpose of this Lab

Frog Dissection Pre-Lab Notes

Purpose of this Lab: • Hands-on experience viewing anatomy and structure of a living organism • Identifying major organ systems in a frog

Safety Guidelines For this Lab: 1. Conduct yourself in a responsible and safe manner at all times during the dissection. 2. Wear all safety equipment (gloves and goggles). 3. Use the proper procedures to pin the frog to the dissecting pan. Do not dissect the frog while holding it. 4. Handle the scalpel with extreme care. It is sharp enough to cut through skin. 5. Always cut AWAY from your body and away from other students. 6. Never remove frogs/frog parts from the classroom. 7. Clean and WASH all materials/tables used for dissection and wash hands BEFORE and AFTER dissection.

Tools Used in Dissection: • Teasing or Dissection needle (A) which used to pull apart muscle tissue, • Dissecting scissors (B) which is used to cut through tissue, and • Forceps (C ), which is used to lift and move cut tissue. A B C

Tools Used in Dissection Continued: • Dissecting Pins (D)Holds down specimen • Dissecting Pan (E)Collects fluids and contains specimen • Scalpel (F) - sharp tool used to cut specimen D E F

Incision Sites for Frog Dissection

Liver Gallbladder Heart Oviducts Small Intestines Stomach Kidney Large Intestine Ureter Urinary Bladder Cloaca and Anus

Frog Organ Systems: 1. Oviducts- produces eggs 2. Cloaca- Opening used for laying eggs and passing solid waste 3. Small Intestines- absorbs nutrients 4. Large Intestines- absorbs water 5. Liver- removes toxins and waste from blood 6. Stomach- Digests food 7. Ureter- removes liquid waste from body 8. Urinary Bladder- holds liquid waste from body 9. Kidneys- filters body fluids and creates urine 10. Gallbladder- produces bile that aids digestion of food 11. Heart- Pumps blood throughout the body

Frog Head and Mouth Structures

Male vs. Female Frog Male Female

Summary • Give a 5 sentence summary on your notes from today. • Have it stamped off by your teacher • Start working on the Pre-Lab Activity Guide • THIS GUIDE MUST BE STAMPED OFF by the end of the PERIOD NOTE: IF YOUR PRE-LAB is not stamped and signed by beginning of class FRIDAY, you will NOT PARTICIPATE in the LAB.