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Skeletal System AP1
Question | Answer |
---|---|
The skull, the vertebral column and thoracic cage, pectoral girdle and upper limbs, and pelvic girdle and lower limbs | skeletal system |
Function: support, movement, mineral storage, blood cell formation | skeletal system |
The skeletal system is divided into what 2 sections? | Axial and appendicular skeleton |
Consists of skull, vertebrae, sternum, ribs, sacrum, and hyoid | axial skeleton |
Consists of pectoral girdle, upper limbs, pelvic girdle, and lower limbs | appendicular skeleton |
80 bones make up this skeletal section | axial skeleton |
126 bones make up this skeletal section | appendicular skeleton |
Total number of bone in adult human body | 206 |
2 types of bones | compact and spongy |
Smooth and homogenous | compact |
A lot of open space & trabeculae which are bars of bones | spongy bone |
Have huge blood supply and are mostly made up of compact bone | long bone |
Usually a long shaft with two heads | long bone |
Examples: humerus, femor, phalanges | long bone |
Examples: wrists and ankles | short bones |
Mostly spongy bone | short bone |
Compact bone that sandwiches spongy bone (cube shaped) | flat bone |
Examples: skull, scapula, ribs | flat bones |
Examples: some facial bones (sphenoid), vertebrae | irregular |
4 types of bone | Short, long, irregular, and flat |
2 special types of bones | sesamoid and wormian/sutural bones |
Special types of short bone formed at tendons | sesamoid |
Tiny bones between cranium bones | wormian/sutural |
Vary in terms of number; location is different for each individual | special types of bone |
Depressions and openings | fissure, fontanels, foramen, fossa, meatus, sinus |
Processes that form joints | condyle, facet, head |
Attachment processes | crest, epicondyle, linea, process, trochanter, tubercle, tuberosity |