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Skeletal

System

 TEAM:

Universidad Autónoma

Del estado de HidalgoÁrea académica de medicinaICSa

SUBJECT: ENGLISH

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APPENDICULAR

SKELETON The human skeleton is anendoskeleton (internal skeleton)made of bone and cartilage.

 The skeleton is divided into:

1.Axial Skeleton: skull,backbone, ribs and sternum.2.Appendicular Skeleton:

pectoral girdle, pelvic girdle andlimbs.

Skeletal

System

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Major Functions

Support for the soft tissues andlargely responsible for the shapeof the human body.

Movement

Protection

 The brain is protected by theskull.

 The heart and lungs are

protected by the rib cage.

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NEUROCRANIUM ANDFACIAL BONES

It´s the set of bones thatsurround and

protect thebrain and senseorgans.

Normally thereare 28 bones inthe skeleton of the head, whereonly the jaw is

FRONTAL

PARIETAL OCCIPITAL

 TEMPORAL SPHENOID MALAR

ETHMOID

NASAL

MAXILLA

MANDIBLE OR JAW

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Vertebral Column

Spine or Backbone: Also known as the vertebralcolumn. It is composed of 33 small bones in a line -cervical (7), thoracic (12), lumbar (5), sacrum (5),coccyx (4). The vertebrae of the sacrum and coccyxare fused together. The vertebrae of the other regionscan move slightly giving flexibility to the backbone.

 There are cartilage discs between these that act as

shock absorbers. They help to protect the vertebrae. The vertebrae are held in position by ligaments.

Muscles attached to their surfaces also support thevertebrae. Spinal nerves emerge in pairs from thespinal cord between the vertebrae.

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m s: Lower

Extremities Ther

e are32

bonesfound in

thelowerlimb:

 The big toe (hallux)only has 2

phalanges

 There are also 2extra bones in the

foot, calledsesamoid bones. These small bones

develop within thetendon of the flexor

hallucis longus

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UpperExtremities

 The arms and legs havesimilar design.

 There are long upperbones. In the arm it is thehumerus and in the leg itis the femur. Also, thereare two long bones in themedial region: The ulnaand radius in the arm and

the tibia and fibula in theleg. 

 The foot and hand havesimilar bones. Thecarpals are in the wrist of the arm and the tarsalsin the ankle of the leg.

 The metacarpals are inthe palm of the hand andmetatarsals in the hindfoot. The phalanges arein the fingers and toes.

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REFERENCES

http://home.comcast.net/~wnor/llb 

http://leavingbio.net/Skeletal/The%