Name ___________________________________ Date _______________________ Period ______
Rat Dissection Lab Student Page
PreAP Biology
PRE LAB:
1. Compare the skeletal systems of the rat and human. Color the homologous bones on each. Ex. cervical
vertebrae would be colored blue on both the rat and human; thoracic vertebrae would be colored yellow on
rat and human; etc.
bones of
the
cranium
zygomatic
maxilla
mandible
clavicle
cervical vertebrae
scapula
manubrium
sternum
xyphoid process
thoracic vertebrae
humerus
lumbar vertebrae
radius
ilium
ulna
sacrum
carpals
metacarpals
coccyx
phalanges
pubis
ischium
obturator foramen
pubic symphysis
femur
patella
fibula
tibia
calcaneus
tarsals
metatarsals
phalanges
2. Label the External features of the male and female rat using the word bank below.
mammary papillae (use twice)
penis
vaginal orafice
scrotum
3. Label the internal diagram of the rat using the word bank below.
Diaphragm
Esophagus
Large
Larynx
Liver
Lung (use twice)
Small
Spleen
Stomach
Thyroid
Trachea
4. Label the heart diagram using the word bank.
aorta (2 times)
inferior vena cava
left atrium
left pulmonary artery
left pulmonary veins
left ventricle
right atrium
right pulmonary artery
right pulmonary veins
right ventricle
superior vena cava
6 & 12 are atrioventricular valves
13 is a semi lunar valve
5. Label the male and female urogenital systems using the word bank below.
Bladder (use twice)
Epididymis
Kidney (use twice)
Ovary
Penis
Scrotum
Testis
Ureter (use twice)
Urethra (use twice)
Uterine horn
Vas deferens
END OF PRELAB
POST LAB
Analysis Questions
1. The sex of your rat was ____________ because its external genitalia includes _______________
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2. Can you tell the sex of a rat based on whether it has mammary papillae? ________ Why or Why not?
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3. What digestive organ was NOT present in the rat that is present in humans?
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4. Why does the rat’s uterus require horns? _________________________________________________
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5. Trace a drop of urine (write out the organs/vessels in order) starting with the kidney to the outside of the
body.
6. Trace a drop of blood (write out the organs/vessels in order) as it returns to the heart from the body
(deoxygenated) until it returns back to the body (oxygenated).
7. Discuss the similarities and differences between the circulatory systems of the crawfish, starfish, rat,
and human. Use one paragraph for similarities and one for differences.
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8. Discuss the similarities and differences between the digestive systems of the crawfish, starfish, rat, and
human. Use one paragraph for similarities and one for differences.
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