University:
Boston University
Course:
CAS BI 107 | Biology 1
Academic year:

2020
Views:

478

Pages:

4
Author:

Bedouinayez

Outside of the frog: We learned some interesting things about human bodies in the Body Metrics lesson. Let’s see if those size relationships are the same in frogs! PREDICTION 1: The length of the hand is a third of the arm. 1. frog hand length: ________ cm 2. frog arm length: _________ cm 3. ratio = frog _ hand _ length = __________ frog _ arm _ length 4. Was the ratio the same as in humans? (HINT: was the answer to #3 close to 0.333?) PREDICTION 2: The span of the frog’s arms is Equal to the frog’s height. 5. frog arm span length: ______ cm 6. frog height: ______ cm 7. Was the ratio the same as predicted? (HINT: were the answers to #5 and #6 similar?) PREDICTION 3: The length of the hand is equal to 9 times the height. 8. frog height (from #6): ______ cm 9. frog hand length (from #1): ______ cm 10. ratio = frog _ height = __________ frog _ hand _ length 11. Was the ratio the same as in humans? (HINT: Was the answer to #10 close to nine?) 12. To determine the frog’s sex, look at the hand digits, or fingers, on its forelegs. A male frog usually has thick pads on its "thumbs," which is one external difference between the sexes, as shown in the diagram below. Male frogs are also usually smaller than female frogs. Observe several frogs to see the difference between males and females. Is your frog male or female? __________________ Inside of the frog: 13. Locate FIVE of the structures identified below. Write next to the body part if it is used for (P) protection, (E) eating, (B) breathing, or (M) moving. __E____ __small intestine____________ _______ __________________________ _______ __________________________ _______ __________________________ _______ __________________________ _______ __________________________ 14. Choose ONE organ to draw. a. organ name: ______________ b. organ width: _______ cm c. organ length: _______ cm d. Draw your organ below at TWICE ITS ACTUAL SIZE. e. Check yourself: length of drawing: ________ cm width of drawing: ________ cm