Name: ________________________________________ Section: ___________ ANT 3514C – Introduction to Biological Anthropology • Apply positional terminology to describe the relationships of osteological features • Identify and label the largest bones and features of the human skull and skeleton • Identify the human dental formula and different tooth types • Examine the functional implications of different skeletal regions • Understand the dynamic biology of the human skeleton over an individual’s lifespan To provide an introduction to basic osteological knowledge. Osteology is the detailed study of bones and teeth. It should come as no surprise that for many centuries people have been heavily invested in studying human anatomy for its medical applications. The fundamentals of human anatomy were understood by most ancient civilizations, and the study of anatomy in Western universities – even through the Middle Ages – was founded on the antique writings of the Greek physician Aelius Galenus (“Galen”) from the late 100’s A.D. Ironically, the laws of the Roman Empire that Galen served forbade the dissection of human beings, and therefore his anatomical descriptions were based not on the direct study of humans, but rather the comparative study of animals such as pigs and primates. It wasn’t until the Renaissance that intellectual curiosity in the human body was reborn and the study of human anatomy was pursued again in earnest. Principal among these anatomists were figures such as Henry Gray (of “ ”) and Georges Cuvier, who pushed the study of comparative anatomy to new limits and founded the field of paleontology. While the skeleton plays an obvious role as the support system for the rest of the body—making movement possible, and protecting vital organs like the heart, lungs, and brain—a new understanding is emerging of bones as an important, dynamic organ of the body. Your bones achieve their shape s to the influence of the muscles, blood vessels, and nerves that surround them, but continue to change throughout life in response to activity, nutrition, and disease. In addition to vital metabolic and physiological functions, bones produce a hormone (an important messaging molecule in the body) named osteocalcin that plays a vital role in your body’s ability to maintain healthy blood sugar, regulate testosterone levels, and stave off depression. Despite its deep roots in the study of anatomy, human osteology, especially in terms of variation and development, is still the subject of much new research utilizing state-of-the-art methods. Bone histology, laser scanning, computed tomography, and strain analyses are just some of the newest techniques used at both the micro and macro scale to examine the properties of human bone from every angle. Using such powerful methods, biological anthropologists are able to answer questions about human identity, ancestry, lifestyle, development, and evolution from studying bones alone Observe the articulated human and macaque skeletons, both in anatomical position, to answer the following questions. The definitions of these terms always have the same , but the direction they point in will change based on an animal’s normal posture. For instance, think about how you, a , normally stand vs. a , like a dog (or a horse, or a baboon). ! : • Divides the body into and halves. • Divides the body into and halves. • Divides the body into and halves A is ______________________ or ______________________ to B on the skeleton. C is ______________________ or ______________________ to D on the skeleton. F is ______________________ to G on the macaque and human skeleton. The blue line runs along the ________________________ plane of the skeleton. The skull plays an important role in understanding evolutionary history. ( Photo credit: eskeletons.org ) Name the three sutures marked with #s. Name the three bones marked with letters. 1. _______________________________ A. _______________________________ 2. _______________________________ B. _______________________________ 3. _______________________________ C. _______________________________ 4. Which two bones make up the zygomatic arch? Because teeth preserve well in the fossil/archaeological record, they are often used in constructing phylogenetic relationships among living and extinct organisms. Examine the following pictures and answer the following questions. ! ! 1. What are the four human tooth types? 2. What is the human dental formula? write out in the standard order. 3. Name the bone that holds the upper teeth and the bone that holds the lower teeth. Examine the vertebral column. There are 24 movable vertebrae – 7 cervical, 12 thoracic, and 5 lumbar. The sacrum and coccyx are fused vertebrae and form part of the bony pelvis. (0.5 pt) Watch this video: ! 1. The vertebrae bear body weight, anchor ligaments and muscles, and protect the spinal cord. What is the name of the repeating structure that separates each unfused vertebra? 2. Which group of vertebrae articulates with the ribs? The human pelvis protects and supports abdominal organs, while anchoring muscles of the abdomen and lower limb. It is an area that provides critical information on locomotion patterns and sex determination. 1. Which three bones fuse to form the os coxa? the bone on which you sit. 2. Just the ball-and-socket hip joint. Notice how the femoral head articulates with the acetabulum in this video ( ). You will see how this joint looks different from the shoulder joint in Station 6. Observe the provided specimen and the articulated skeleton near this station when answering these questions. 1. Which bone of the lower arm is on the same side as your pinkie? _________________ 2. Which bone of the lower arm is on the same side as your thumb? _________________ 3. A) List the bones that, along with the humerus, form the shoulder joint. B) Name the features of the distal humerus that articulate with the radius and ulna at the elbow joint. 4. Compare the shoulder joint ( to the hip joint in Station 5. Compare the articulated hand ( and foot ( . The rays or digits are numbered one through five beginning with the thumb or big toe. ! 1. What are some of the differences you observe between the hand and the foot? How can these differences be attributed to function? Ruff CB (2006) Gracilization of the modern human skeleton. 94(6): 508-514. 1. Define the following terms as they apply to . Be sure your definitions make sense in an osteological context: a. Robust: b. Gracile: 2. Describe how bone properties change during the normal aging process throughout a human lifespan. (You can draw a diagram illustrating this if you wish, but if you do its meaning must be clear to receive credit.) that there are phases to describe: 1) bone growth as the individual grows to maturity, and 2) bone degeneration in old age. 3. What cultural explanations have been used to account for the gracilization of the human skeleton during our recent evolution? Use Appendix A of your text and the following terms list to label the skeleton. Sternum Frontal Parietal Mandible Metatarsals Clavicle Scapula Humerus Patella Tibia Ulna Fibula Metacarpals Os Coxa (also innominate bone) Femur Carpals Tarsals Radius Vertebra Phalanges (use this term twice) !
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