F 23 LE 7 Functional Anatomy

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Pasadena City College *

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001

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Anatomy

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Dec 6, 2023

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6

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LA #7 – Functional Anatomy Introduction Functional anatomy studies the relationship between bone form and function, and is the basis for fossil interpretation. In this lab you will apply what you’ve learned about the skeleton and behavior to develop hypotheses and “make sense” of fossil materials. Instructions The lab is divided into several “stations,” each with a set of specimen images and corresponding questions for you to answer. Station 1 – Cranium Use the images of the Cranium A and Cranium B crania provided below to answer questions 1 – 7. Be sure to use the appropriate anatomical and directional terms in your responses. Cranium A Cranium B 1. Compare the size and shape of the frontal bones for Specimen A and B. Note any differences you observe.
2. For Specimen A, where is the widest portion of the cranium? 3. For Specimen B, where is the widest portion of the cranium? 4. Compare the overall shape of the occipital region for Specimens A and B and note any differences you observe. 5. Compare the facial skeleton and the braincase for Specimen A (think of the superior border of the eye sockets as the “dividing line” between the two). Which seems larger? 6. Compare the facial skeleton and the braincase for Specimen B, which seems larger? 7. Develop a behavioral hypothesis to explain at least one difference you noted between specimen A and B. Station 2 – Dentition Use the images of Specimens C – E to complete #8.
Specimen C Specimen D Specimen E 8. Identify Specimens C – E to Complete Table 1 using the appropriate scientific terms:
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Table 1 Specimen Posterior Tooth Type Dietary Behavior C D E Station 3 – Appendicular Skeleton Use the images of Specimens F – J to complete #9 - 11. Be sure to use the appropriate scientific terms in your responses. Specimens F - J 9. Briefly explain how to distinguish between an arboreally-adapted and a terrestrially- adapted ulna. Be sure to identify the specific landmark(s) you would evaluate, and their anatomical location(s).
10. Briefly explain how to distinguish between an arboreally-adapted and a terrestrially- adapted femur. Be sure to identify the specific landmark(s) you would evaluate, and their anatomical location(s). 11. Complete Table 2 to identify Specimens F – J, using the appropriate anatomical terms: Table 2 Specim en Bone Arboreally- or Terrestrially- adapted F G H I J Station 4 – Fossil Interpretation Use the Bone Assemblage provided below to answer #12 with the appropriate anatomical terms. Bone Assemblage 1 12. Your task is to create a skeletal inventory and behavioral profile for the primate specimens in Bone Assemblage 1, which come from a single individual.
a. Fill in Table 3 to complete your skeletal inventory for Bone Assemblage 1. The first row is done for you to provide an example. Table 3 b. Formulate a hypothesis to explain the dietary behaviors of this primate. Be sure to explain and support your hypothesis with relevant data from Table 3 (i.e. bones and landmarks). c. Do you think this primate is arboreally- or terrestrially-adapted? Be sure to explain and support your answer with relevant data from Table 3. d. Come up with one more behavioral hypothesis for this primate, and briefly explain how you would test it with specimens from Bone Assemblage 1. Be sure to identify the specific bones and landmarks you would use. Image Attribution Phil Myers on animaldiversity.org , licensed under CC BY NC SA 3.0 University of Austin at Texas & John Kappelman on eskeletons.org ; licensed under CC BY NC SA 2.0 Bone Axial or Appendicular Observable landmarks Mandible Axial posterior dentition; bunodont cusps
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