Chapter 7: The Axial Skeleton Flashcards
Total number of bones in the axial skeleton
80
Number of cranial cavity bones
8
Hyoid bone
Does not articulate with any other bone. In place superior to thyroid membrane.
Considered part of the axial skeleton
Number of facial bones
14
Number of auditory ossicles
6
Number of bones in the vertebral column
26
Number of bones in the thorax
24 ribs
1 sternum
Total number of bones in the adult body
206
2 major types of surface markings on bones
Depressions and openings
Processes.
Fissure
Narrow slit between adjacent parts of bones. Allows vessels or nerves passage
Foramen
Opening through which blood vessels, nerves, or ligaments pass
Fossa
A shallow depression
Sulcus
Furrow along a bone that accommodates vessels, nerves, or tendons.
Meatus
A tubelike opening.
Condyle
A process. Large, round protuberance with a smooth Articular surface at the end of bone.
Facet
Process. Smooth, flat, slightly concave or convex Articular surface.
Head
Process. Usually a rounded Articular projection supported by the neck.
Crest
Process. Prominent ridge or elongated projection
Epicondyle
Process. Tissue attachment. Typically roughened projection above a condyle.
Line
Process. Long, narrow ridge or border (less prominent than crest)