toonlanat thuanthong the skeletal system. functions of the skeletal system support body weight...
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TOONLANAT THUANTHONG
THE SKELETAL SYSTEMTHE SKELETAL SYSTEM
Functions of The Skeletal system
• Support body weight• Enable movement• Protect vital organs• Point of attachment for muscles• Storage of minerals
Bones Classifications
By region
• Axial Skeleton• Skull• Vertebrae• Ribs• Sternum
• Appendicular Skeleton• Upper extremities• Lower extremities
Bones Classifications
• By shape
Harversian system
Compact boneCompact bone
Bone marrow• Red bone marrow
• Yellow bone marrow
– Fat cell
Microscopic Structure of Bone
Bone development or growth
• Intramembranous ossification– formation of cranial bones of the skull and the clavicles– An ossification center appears– Bone matrix is secreted within the fibrous membrane
Bone development or growth
• Endochondral ossification – Uses hyaline cartilage “bones” as models for
bone construction– Formation begins at the primary ossification
center
Bone repair
SKULL
Frontal Frontal
MandibleMandible
ParietalParietal
TemporalTemporal
Frontal Frontal
OccipitalOccipital
MandibleMandible
MandibleMandible
OccipitalOccipital
ParietalParietal
TemporalTemporal
TemporalTemporal
OccipitalOccipital
Fontanelle
-Anterior fontanelle จะปิ�ดสนิ�ทเมื่� ออายุ� 12-18 เด�อนิ
-Posterior fontanelle ปิ�ดเมื่� ออายุ�ปิระมื่าณ 2 เด�อนิ
Vertebral Column• 7 Cervical• 12 Thoracic• 5 Lumbar• 1 Sacrum• 1 Coccyx
Sacrum
Sternum
Ribs
• True ribs - 1 st - 7th ribs • False ribs - 8 th - 10th ribs • Floating ribs - 11th - 12th ribs
Scapula
Humerus
Ulna
Radius
Carpal bone
Pelvis
symphysis Pubis
Sex Determination
FemurFemurTibia
Fibula
Patella
joints
• Classification of joints– Fibrous joints
• Suture• Syndesmosis
– Cartilaginous joints • Synchondrosis• Symphysis
– Synovial joints • Gliding joint • Hinge joint • Pivot joint • Ellipsoidal joint/ condylar joint
Fibrous joints
Cartilaginous joints
Synovial joints
Humerus
Scapula
Foramen magnum
Mandible
Frontal bone
Carpal bone
Metacarpal bone
Sacrum
ClavicleClavicle
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