Pin the forelimbs and hindlimbs to the tray. (Follow the External Anatomy and Inside the Mouth slides) After answering the questions on the exterior, placing the frog on the tray ventral side up. Procedure Examine the exterior of the frog.
Rub your finger along the inside of the jaw, you will feel the maxillary teeth. What unusual features do you notice? Find the two knobs that come out of the roof of the mouth. Inside the Mouth Identify: Two large Muscular Pads are in the roof of the mouth (eyes retract here when it blinks) Locate Tongue. How many Digits are there to each hindlimb? Examine the muscular hindlimbs Locate the thigh, knee, and ankle joints Examine the webs of the foot. How many Digits (fingers) are there to a Forelimb? At the posterior end of your frog is the Cloaca (feces, urine, and reproductive cells are expelled here). Locate the shoulder, elbow, and wrist joints of the Forelimbs.
Locate the Tympanic membrane (ear drum) just posterior to the eye.
#Youtube frog dissection skin
Materials A dissecting tray Pins A frog Scalpel Scissors Forceps Įxternal Anatomy Identify: Take notice of the skin The external Nares (nostrils) The eyes and the third eye-lid (which covers the eye when underwater.
Terminology Dorsal-on or near the back Ventral-on or near the front (opposite of dorsal) Posterior-on or near the behind Anterior-on or near the top īackground Information Click on this video to learn about the environmental threats on frogs Click on this video to learn about frogs skin and its qualities Main Menu Terminology Background Information Materials External Anatomy Inside the Mouth Procedure Copy of Worksheet Concept Map Author’s information Resources Frog Dissection By, Sammi Krystiniak Ed 205 section 09