BIOL 1103 Study Guide - Final Guide: Hyoid Bone, Bone, Periosteum

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Department
Course
Professor
Skeletal System
Human adults have 206 bones"
Axial - 80 bones
Function is to protect the major organs of nervous, respiratory and circulatory systems. "
Skull (28 bones)"
Cranial (8 bones)"
Auditory (6)"
Malleus (2)"
Incus (2)"
Stapes (2)"
Facial ( 14)"
Hyoid bone (1 bone)"
Not connected to any other
bone"
Vertebral Column (26 bones)"
Thoracic cage (25 bones)"
Ribs (24)"
Sternum (1)"
Appendicular - 126
Protects the organs of digestion and reproduction."
Structure of bone (OSSEOUS)
Consists of an organic component (the cells & matrix) and inorganic (mineral)
component "
Minerals Are mainly calcium and phosphate"
Type of bone :
Compact bone : Also known as the cortical bone; hard, and dense, forms outer layer
of bone. "
Cancellous Bone : spongy, lighter and found in the interior of the bones"
Bone layers:
Periosteum : Connective tissue, capable of repair contains osteoblasts (bone forming
cells). Attached to compact bone by Sharpey’s fibers.
Compact : hard, dense and forms the strong outer layer of the bone
Cancellous bone and bone marrow :
found inside the compact bone"
Contains trabeculae(honey comb like appearance) that are filled with bone marrow. "
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Document Summary

Skeletal system: human adults have 206 bones. Function is to protect the major organs of nervous, respiratory and circulatory systems: skull (28 bones, cranial (8 bones, auditory (6, malleus (2, stapes (2) Facial ( 14: hyoid bone (1 bone, not connected to any other bone, vertebral column (26 bones, thoracic cage (25 bones, ribs (24, sternum (1) Structure of bone (osseous: consists of an organic component (the cells & matrix) and inorganic (mineral) component, minerals are mainly calcium and phosphate. Compact bone : also known as the cortical bone; hard, and dense, forms outer layer of bone. Cancellous bone : spongy, lighter and found in the interior of the bones. Periosteum : connective tissue, capable of repair contains osteoblasts (bone forming cells). Compact : hard, dense and forms the strong outer layer of the bone. Cancellous bone and bone marrow : contains trabeculae(honey comb like appearance) that are lled with bone marrow. found inside the compact bone.

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