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Skeletal System Intro
N/A
21
Anatomy
Undergraduate 4
09/14/2009

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Cards

Term
Functions of the Skeletal System
Definition
1. Support the body's soft tissues and internal organs
2. Stores materials like calcium
3. Blood cells are produced in bone marrow
Term
Two Types of Bone TIssue
Definition
1. Compact (or dense) - hard, outer layer
2. Spongy (or cancellous tissue) - inner layer
Term
Composition of Bone
Definition
1. Organic Material - 30% (cells and collagenous fibers, bone flexibility)
2. Inorganic Material - 70% (hydroxyapatite, bone support/strength)
Term
Periosteum
Definition
glossy, smooth, tough, fibrous membrane containing 2 layers
Term
Two Layers of the Periosteum
Definition
1. Outer fibrous layer - where tendons and ligaments lie
2. Inner cellular layer - produce osteoblasts
Term
Osteoblast
Definition
bone forming cells
Term
Osteoclast
Definition
bone dissolving cells
Term
Osteocytes
Definition
former osteoblasts that have become trapped in the matrix
Term
T/F: Is bone always forming and deforming?
Definition
True
Term
Epiphyses
Definition
spongy bone present at the proximal and distal ends of a long bone
Term
Diaphysis
Definition
compact one present at the shaft of a long bone
Term
Bone (surface) markings
Definition
certain anatomical features on a bone
Term
Head
Definition
rounded articular projection, supported on the neck of the bone
Term
Neck
Definition
a constriction below the head, connects it to the body of the bone
Term
Tubercle
Definition
a relatively small bump on a bone
Term
Tuberosity
Definition
relatively large bump on a bone
Term
Fossa (cavity)
Definition
shallow depression in a bone
Term
Groove
Definition
elongated depression
Term
Trochanter
Definition
very large projection
Term
Condyle
Definition
an irregular, smooth surface that helps articulate with another bone, cone-shaped
Term
Epicondyle
Definition
a projection above a condyle, used for muscle attachment
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