The Skeletal System

The Skeletal System

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The skeleton is a strong, flexible framework that supports the body and protects the infornal or glands.
Consist of 206 bone

AXIAL is made up of the bones of te head, neck, and trunk.




APPENDICULAR is made up of the bone sof the arms and legs and their supports

TYPES OF BONES



Long Bones are bones in your legs and arms.

Short Bones are almost equal in lenghts and width (wrists and ankles)

Flat Bones are somewaht thinner and much flatter than other bones, they are located inthe skull . The scapula or shoulder blade is an example of a flat bone






Irregular Bones are irregularly shaped bones such as some facial bones or verebrae

CARTILAGE

• Is a strong, flexible connective tissue it is another component of your skeletal system.

JOINTS

• Joints are points at which bones meet.



• Ball and socket joints are formed when the rounded head of one bone fits into the rounded cavity of an adjoining bone
  



• Pivot Joints allow limited rotation ot turning of the head.







• Ellipsoidal Joints such as the one in your wrist have an oval shaped part and is curved
  
  
  

CARING FOR YOUR SKELETAL SYSTEM

Caring for your skeletal system is important so your body will not get skeletal disorder.







FRACTURES is any type of break in a bone

OSTEOPOROSIS

Condition in which proggressive loss of bone tissue accurs

SCOLIOSIS

Lateral or side to side curvature of the spine

INJURIES TO JOINTS

Dislocation-results when the ligaments that attach the bone at the joint are torn

Torn cartlidge-can result from a sharp bow or the twisting of a joint.

REPETITIVE MOTION INJURY

This is damage to tissue caused by prolonged repeated movements such as sewing or computer work

THE MUSCULAR SYSTEM

TYPES OF MUSCLES-SMOOTH MUSCLES act on lining of passageways and internal organs. SKELETAL Muscles are attached to bone and cause body movements. FLEXOR is a muscle that close a joint. EXTENSOR is a muscle that opens a joint. CARDIAC MUSCLES is a type of straited muscle that forms the wall of the heart.

CARE OF THE MUSCLE SYSTEM

Regular physical activity is the best way to care for the muscular system. MUSCLE TONE is the natural tension in the fibers of a muscle.

PROMBLEMS OF THE MUSCULAR SYSTEM

Bruise-is an area of dislocated skin that appears after an injury causes the blood vessels beneath skin to rupture and leak

Muscle strain or sprain-results when a muscle is streched or partially torn as a results of overexertion

Tendonits-or the inflamtion of a tendon

Hernia-occurs when an organ or tissue protudes through an area of weak muscles.

MUSCLE DYSTROPHY is inherted disorde in which muscle fiber are destroyed.

THE NERVOUS SYSTEM

NEURONS

Neurons are nerve cells.

Cell body-contains the nucleous, the control center.

Dendrites-are branched structures that extend from the cell body in most neurons.

Axons-transmit impulses away from the cell body and toward another neuron, muscle cell, or gland.

CENTRAL NERVOUS SYSTEM

Spinal Cord-is a longcolumn of nerve tissue about the thickness of your index finger extending about 18 inches down your back.

THE BRAIN


Intergrates and controls the activities of your nervous system.

BRAIN STEM

Is a 3 inch stalk of nerve cells

CEREBELLUM

Second largest part of the brain