Doncouse_Jeremy_Week8

Doncouse_Jeremy_Week8 - Running head: Chapter 8 1 Week 8...

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Running head: Chapter 8 1 Week 8 Written Assignment: Chapter 8 Jeremy Doncouse Mountain State University
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Running head: Chapter 8 2 Chapter 8: Joints 1. Define fontanels and indicate their significance. At birth, the skull bones are still incomplete and are connected by as yet unossified remnants of fibrous membranes called fontanelles. These fontanelles allow the infant’s head to be compressed slightly during birth and accommodate brain growth in the fetus and infant. The anterior fontanelles is palpable for 1 ½ to 2 years after birth while the others are replaced by bone by the end of the first year. 2. Classify joints structurally and functionally. Structural classification focuses on the material binding the bones together and whether or not a joint cavity is present. Structurally, there are fibrous, cartilaginous, and synovial joints. Functional classification is based on the amount of movement allowed at the joint. There are synarhroses (immoveable joints), amphiarthroses (slightly moveable joints), and diathroses (freely moveable joints). Most common are the diathroses joints. Immovable and slightly movable joints are generally found in the axial skeleton because they need to be more stable. Generally, fibrous joints are immovable and synovial joints are freely movable. Cartilaginous joints have both rigid and slightly movable examples. Structural classification is more clear-cut than functional classification. 3. Describe the structural characteristics of synovial joints.
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Doncouse_Jeremy_Week8 - Running head: Chapter 8 1 Week 8...

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