Name ______________________________________ Date _______________________
Rat Dissection – GROUP QUIZ
Use your lab packets to help.
One paper must be completed and turned in per person.
Good luck!
1. Define the word DISSECTION: ______________________________________
Muscular and Skeletal System of the Rat
Label the following muscles indicated by the arrows:
2.
3.
4.
5. Is the above a DORSAL or VENTRAL view? ___________________
Label the actions of following muscles indicated by the arrows:
6.
8.
7.
Name____________________ Period __ Date ___________________
Label the name of this muscle
9.
Label the actions of the following muscle indicated below:
10.
a
Name____________________ Period __ Date ___________________
Label the following bones indicated by the
arrows:
11.
(most proximal bone)
12.
(smaller than #13)
13.
Name____________________ Period __ Date ___________________
Abdominal Cavity of the Rat
14. #12 is the jejunum. To where will food pass next? _____________
12
.
15. What organ is #12 a part of?____________________
16. What organ system is #12 a part of? _______________
17. From was organ does food come to enter #12? ____________
18. What part of that organ does food leave to enter #12? ____________
Name____________________ Period __ Date ___________________
19. (thin, internal layer of
muscle)
20. (1st part of small
intestines)
21.
22a.
22b. What is the function of #22? __________________________________________
23. What is the difference between mesentery and omentia?
24. Action of the gastrocnemius:
25. Action of the spinotrapezius:
26. Which organ is at the superior surface of the heart?
Name____________________ Period __ Date ___________________
27
28
Name____________________ Period __ Date ___________________
1
24
2
25
3
26
4
27
5
28
6
29
7
31
8
31
9
32
10
33
11
34
12
35
13
14
15
16
17
18
19
20
21
22a
22b
23
Name____________________ Period __ Date ___________________
Thoracic Cavity of the Rat
29. __________ lung
30. _________________ lung
31. ____________________
32-35. Determine the ages of the rats on the table up front.
Name____________________ Period __ Date ___________________
Female Urogenital System:
27.
26.
Name____________________ Period __ Date ___________________
Name____________________ Period __ Date ___________________
DEVELOPMENT OF THE RAT
Age
Size
(days)
(mm)
Identification of Stages
1
0.07
1 cell (in oviduct)
2
0.08 x 0.06
2 cells (in oviduct)
3
0.08 x 0.05
4 cells (in oviduct)
4
(0.08 x 0.03) Early blastocyst (in uterus)
5
(0.12 x 0.05) Free blastocyst (in uterus)
6
(0.28 x 0.07) Implanting blastocyst
7
(0.3 x 0.1)
8
(1.04 x 0.26)
9
1.5
bent dorsally
10
2
yolk sac; embryo bent dorsally
implantation
start of 3rd layer formation; blastemas of heart and
pericardium
Name____________________ Period __ Date ___________________
10.5
2.4
yolk sac placentas; embryo reverses, curves ventrally
11
3-5
arm buds recognizable
12
5-7
start of umbilical herniation
13
8
15
12
facial clefts closed
16
15.5
snout lifts off chest
17-18
16-20
20-40
19-22
prominent facial processes and clefts; nose-snout
projecting; round handplates and footplates
1st fetal stage: rapid growth of eyelids, palate complete;
pinna covers ear duct; umbilical hernia withdraws
2nd fetal stage: sealed eyelids; fetal membranes and
placentas reach peak of development; tail grows to 10mm;
Birth occurs 22nd day in rat