Rat Dissection 1: External Anatomy
NAME______________________ PER______
Read and follow all written and verbal instructions!
1. Complete the classification for the white rat. Remember to underline the scientific name.
Kingdom
Phylum
Subphylum
Class
Order
Suborder
Family
Genus
Species
Variety
2. How long does the wild rat live? ____ How long does the lab rat live?_____
3. How many rats are in an average litter? ____
4. How many teats are usually found on a rat?_______
5. Is your rat a male or female? _____ Explain how you can tell the difference between a male and
female rat in terms of external genitalia and mammary papillae. Be specific about both sexes.
6. Label the following directional terms on the diagram below:
frontal plane, transverse plane, sagittal plane, anterior, posterior, dorsal, ventral, medial, lateral
Structures that you are required to know (24 total) :
*Draw a lateral view of your rat on a separate piece of paper and label the following parts.
*Locate the following parts on your pig. You will be quizzed on these later.
External nares
Lips
Inicisor teeth
Molar teeth
Eyes
Vibrissae
Follicles
Pinnae
External auditory meatus
Cranial region
Cervical region
Thoracic region
Abdominal region
Lumbar region
Sacral region
Caudal region
Forelimbs
Hindlimbs
Shank
Digits
Digital pads
Urogenital opening
Anus
Vulva or scrotu