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Skeletal System Functions
Support, Protection, Movement, Storage, and Blood Cell Formation (Hematopoiesis)
Osteocytes
Mature Bone Cells.
Composed of Calcium, Collagen, and Water
Cortical Bone
Dense Bone
Trabecular Bone
Spongy Bone
Categories of Bone
Long, Short (cubes), Flat (thin), Irregular
Osteoblasts
Builds new bone
Osteoclasts
Remove old bone
Ossification
The process of bone being made (Bone formation)
Bone shell covers cartilage
Osteoclasts absorb cartilage to make medullary cavity (
Longitudinal Growth
Grows towards epiphyseal plates at the ends of long bones; ends with adolescence
Circumferential Growth
Bones grow in diameter throughout life
Osteoblasts and Osteoclasts both working
Adult Bone Development
Collagen decreases with age, leads to brittle bones
More problematic for women due to smaller bones
Axial Skeleton
Includes skull, vertebral (spinal) column, and thoracic (rib) cage
Appendicular Skeleton
Shoulder, arms, wrists, and hands
Pelvis, legs, ankles, and feet
Mandible
1
Maxillary Bone
2
Zygomatic Bone
3
Ethmoid Bone
4
Lacrimal Bone
5
Nasal Bone
6
Sphenoid Bone
7
Frontal Bone
8
Coronal Suture
9
Parietal Bone
10
Temporal Bone
11
Squamous Suture
12
Lamboidal Suture
13
Occipital Bone
14
Hard Palate
1
Palatine Bone
2
Maxillary Bone
3
Sphenoid Bone
4
Vomer
5
Parietal Bone
6
Occipital Bone
7
Foramen Magnum
8
Skull
1
Cranium
2
Facial Bones
3
Clavicle
4
Scapula
5
Sternum
6
Ribs
7
Thoracic Cage
8
Humerus
9
Vertebral Column
10
Ulna
11
Radius
12
Coxal (Hip) Bone)
13
Sacrum
14
Coccyx
15
Carpals
16
Metacarpals
17
Phalanges
18
Femur
19
Patella
20
tibia
21
Fibula
22
Tarsals
23
Metatarsals
24
Phalanges
25
Calcaneus
26