Practical Lab | Zoology
Frog (Rana tigrina) Dissection Manual
For: Science Class 11
File Type: PDF | File Size: 375 KB
Download
Click on “Download” to start downloading file.
Inside File:
External Anatomy:
1. Place the frog on the dissecting pan. Do not pin it down.
2. Use these descriptions and the picture to identify each of the following external structures.
2. Use these descriptions and the picture to identify each of the following external structures.
A. Head – the anterior end of the frog extending to and including the eardrums
mouth – the large opening at the anterior end of the head made up of a maxilla and mandible
maxilla – the upper jaw bone
mandible – the lower jaw bone
external nares (i.e. nostrils) – two small openings on the dorsal surface of the head near the tip
eyes – two eyes protrude from the head just posterior to the external nares
nictitating membrane – an extension of the lower eyelid that can come up to protect the eye
tympanum (i.e. eardrum) – round membranes just posterior and ventral to the eyes
maxilla – the upper jaw bone
mandible – the lower jaw bone
external nares (i.e. nostrils) – two small openings on the dorsal surface of the head near the tip
eyes – two eyes protrude from the head just posterior to the external nares
nictitating membrane – an extension of the lower eyelid that can come up to protect the eye
tympanum (i.e. eardrum) – round membranes just posterior and ventral to the eyes
B. Trunk – the posterior end of the frog extending from the head to the hindlimbs
cloacal opening – the hole at the posterior end of the frog (it’s the anus but has more functions)
C. Appendages – the limbs that extend from the trunk including the forelimbs and hindlimbs
forelimbs – short extensions from the anterior end of the trunk
arm – the uppermost section of the forelimb extending from the shoulder to the elbow
forearm – the middle section of the forelimb extending from the elbow to the wrist
hand – the lowermost section of the forelimb extending outward from the wrist
hindlimbs – long extensions from the posterior end of the trunk
thigh – the uppermost section of the hindlimb extending from the hips to the knee
shank – the middle section of the hindlimb extending from the knee to the ankle
foot – the lowermost section of the hindlimb extending outward from the ankle
digits – the fingers and toes; note: there are four finger digits but five toe digits
arm – the uppermost section of the forelimb extending from the shoulder to the elbow
forearm – the middle section of the forelimb extending from the elbow to the wrist
hand – the lowermost section of the forelimb extending outward from the wrist
hindlimbs – long extensions from the posterior end of the trunk
thigh – the uppermost section of the hindlimb extending from the hips to the knee
shank – the middle section of the hindlimb extending from the knee to the ankle
foot – the lowermost section of the hindlimb extending outward from the ankle
digits – the fingers and toes; note: there are four finger digits but five toe digits
Download the file to read more…
Tags:
Biology