Download Frog Dissection Worksheet

Name __________________________
Period____________
DUE: DAY OF DISSECTION! Dissection Date: ______________
Frog Dissection Pre-lab
Directions: Watch the virtual Dissection
http://mhhe.com/biosci/genbio/virtual_labs/BL_16/BL_16.html (link on the webpage)
“Introduction” & “External Anatomy” to answer the questions. Use the second web link to
label the frog’s internal organs with location and function. Expect to take about an hour to
prepare for this dissection.
1. Phylum__________________________________
2. SubPhylum ________________________________
3. Class ____________________________________
4. Why are frogs said to have “two lives?” _________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
External Anatomy
5. Dorsal means? ____________________________________
6. Ventral means? ___________________________________
7. Anterior means? __________________________________
8. Posterior means? __________________________________
9. Head means? _____________________________________
10. Torso means? _____________________________________
11. Frog lungs are poorly developed. How does this relate to their skin being thin and moist? _____________
________________________________________________________________________________
________________________________________________________________________________
12. How does the tympanic membrane work? _________________________________________________
_______________________________________________________________________________
13. List 2 ways forelimbs are different than hind limbs.
1. ______________________________________________________________________________
2. ______________________________________________________________________________
14.
15.
16.
17.
On the
On the
On the
On the
virtual
virtual
virtual
virtual
frog dissection,
frog dissection,
frog dissection,
frog dissection,
what organ
what organ
what organ
what organ
was removed first? _________________________________
was removed second? ________________________________
was removed third? _________________________________
was removed fourth? ________________________________
18. Frogs exchange gasses through the ____________________ and the ______________________.
19. The glottis leads to the frog’s _______________ which connects the mouth to the ________________.
20. Arteries carry blood ____________________ the heart. Veins carry blood __________ the heart.
21. _________________________ connect arteries to veins.
22. A frog’s heart has ___________ chambers. Two atrium and _____ ventricle.
23. Urine and solid waste leaves the frog’s body through an opening called the _______________________.
24. Muscle tissue is usually grouped into large ___________________________.
25. A frog’s skeleton is made up of _____ regions.
26. The axial region consists of _________ bones. The appendicular skeleton consists of ________ bones.
27. The frog’s tongue is anchored in the very front – opposite to the orientation and
anchoring of humans. Why do you think this is so? __________________________
________________________________________________________________
________________________________________________________________
Instructions for Internal Anatomy
28. You will need to visit the second website to identify the location and function of each organ of
the frog’s internal anatomy: http://www.biologycorner.com/bio2/notes-frog.html (Link is on
webpage) ***Please color code the parts.
o
A. Esophagus
______________________________
o
_____________________________________________
o
C. Stomach
o
_____________________________________________
o
D. Pancreas
o
____________________________________________
o
F. Cloaca (black)__________________________________
o
___________________________________________
o
H. Lung
(yellow)
________________________________
(purple)
_______________________________
(orange)
________________________________
(dark blue)
____________________________________________
o
___________________________________________
o
I. Heart
o
____________________________________________
o
J. Liver
o
___________________________________________
o
K. Gallbladder
o
___________________________________________
o
L. Small Intestine
o
_____________________________________________
o
M. Large Intestine
__________________________________
(red)
__________________________________
(brown)
____________________________
(lt. green)
(Dark green)
________________________
)__________________________
(lt. blue
____________________________________________