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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 ____________________________________________