TOONLANAT THUANTHONG THE SKELETAL SYSTEM. Functions of The Skeletal system Support body weight...

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TOONLANAT THUANTHONG THE SKELETAL SYSTEM

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Page 1: TOONLANAT THUANTHONG THE SKELETAL SYSTEM. Functions of The Skeletal system Support body weight Enable movement Protect vital organs Point of attachment.

TOONLANAT THUANTHONG

THE SKELETAL SYSTEMTHE SKELETAL SYSTEM

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Functions of The Skeletal system

• Support body weight• Enable movement• Protect vital organs• Point of attachment for muscles• Storage of minerals

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Bones Classifications

By region

• Axial Skeleton• Skull• Vertebrae• Ribs• Sternum

• Appendicular Skeleton• Upper extremities• Lower extremities

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Bones Classifications

• By shape

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Harversian system

Compact boneCompact bone

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Bone marrow• Red bone marrow

• Yellow bone marrow

– Fat cell

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Microscopic Structure of Bone

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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

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Bone development or growth

• Endochondral ossification – Uses hyaline cartilage “bones” as models for

bone construction– Formation begins at the primary ossification

center

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Bone repair

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SKULL

Frontal Frontal

MandibleMandible

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ParietalParietal

TemporalTemporal

Frontal Frontal

OccipitalOccipital

MandibleMandible

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MandibleMandible

OccipitalOccipital

ParietalParietal

TemporalTemporal

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TemporalTemporal

OccipitalOccipital

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Fontanelle

-Anterior fontanelle จะปิ�ดสนิ�ทเมื่� ออายุ� 12-18 เด�อนิ

-Posterior fontanelle ปิ�ดเมื่� ออายุ�ปิระมื่าณ 2 เด�อนิ

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Vertebral Column• 7 Cervical• 12 Thoracic• 5 Lumbar• 1 Sacrum• 1 Coccyx

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Sacrum

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Sternum

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Ribs

• True ribs - 1 st - 7th ribs • False ribs - 8 th - 10th ribs • Floating ribs - 11th - 12th ribs

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Scapula

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Humerus

Ulna

Radius

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Carpal bone

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Pelvis

symphysis Pubis

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Sex Determination

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FemurFemurTibia

Fibula

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Patella

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joints

• Classification of joints– Fibrous joints

• Suture• Syndesmosis

– Cartilaginous joints • Synchondrosis• Symphysis

– Synovial joints • Gliding joint • Hinge joint • Pivot joint • Ellipsoidal joint/ condylar joint

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Fibrous joints

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Cartilaginous joints

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Synovial joints

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Humerus

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Scapula

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Foramen magnum

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Mandible

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Frontal bone

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Carpal bone

Metacarpal bone

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Sacrum

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ClavicleClavicle

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