vity 7.5 entifying Bone Markings All bones posses istinctive markings or landmar

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vity 7.5 entifying Bone Markings All bones posses istinctive markings or landmarks that are as trochanters, tuberdes, crests, and processes,provide arcas designed for specific functions. For example, certain marks are used as articulating surfaces to form a joint (an ulation) with another bone on the skeleton. Examples includeand bood vessels They include foramina (singular foramen lyles, heads, facets, and trochleas. Other bony features, suchcanals, fissures, and grooves. possess distinctive markings or landmarks that are as trochanters, tubercles, crests, and processes, of attachment for tendons and ligaments. In addition, various types of depressions and openings provide passageways for nerves foramen), Identify examples of bone markings Identify examples of bone markings found on bones in the skall. found on the humerus. A head is a rounded expansion, connected to a narrow neck. A meatus or canal is a bony passagewayA groove is a narrow channel. A sinus is a cavity within a bone. A tubercle is a rounded projection or process A tuberosity is an elevated projection with a roughened surface. A foramen is a round or oval hole or opening. articular process A process is a bony projection An epicondyle is an elevated area, above a condyle. A condyle is a rounded projection, A fissure is a slit-like opening. O identify examples of bone markings identily examples of bone mackisngs found on the pelvis found on the femur. A crest is a prominent narrow ridge A fossa is a shallow depression A line is a narrow ridge, less prominent A trochanter is a large irregularly shaped process (on femur only). Head Neck than a crest A spine is a slender, pointed projection. A ramus is an arm-like projection. MAKING CONNECTIONS A facet is a smooth flat surface t humerus and a femur. How are they similar? How are they different? Compare the heads on a EXEACISE 7 Introduction to the Skeletal System and the Axial Skeleton 89

Explanation / Answer

Ans.

Humerus head is little hemispherical whereas Femur head is somewhat spherical. Heads of both Humerus and Femur are connected to neck. Both the heads are at the end of the Humerus and Femur. Humerus neck is short, Femural neck is long and distinct. Head of Femur articulates with pelvis at acetabulum and attaches at fovea capitis. Head of humerus articulates with glenoid cavity of scapula.

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