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[email protected] pg. 1 A P 1 101 SKELETAL SYSTEM MODULE 4 BEST STUDY GUIDE. Questions & Answers. What is the function of the flat bones? - ANSWER - The flat bones create protection for internal organs, such as the brain. They also produce red blood cells. Describe the shape of a long bone and what its design allows. - ANSWER - Long bones are thin and lengthy. The structure of these bones help to support the weight of the body. Name the five basic bone shapes. - ANSWER - Flat, long, short, irregular, sesamoid Flat - bones of skull, bones in pelvis long - humerus, femur, etc. short - carpals in hand, tarsals in foot irregular - vertebrae Sesamoid - patella What term best describes a hollow chamber in bone, usually filled with air? - ANSWER - Sinus True or false: A sulcus is a raised ridge in bone. - ANSWER - False A sulcus is a depression of a bone What division of the skeleton lies along the midline? - ANSWER - Axial skeleton; Consist of skull, vertebral column, sternum, laryngeal skeleton, and thoracic cage True or false: Fontanelles are present in adults.