The skeletal system provides structure and support to the body, protects vital organs, allows for movement, stores minerals and fat, and produces blood cells. The skeleton is composed of bones of different shapes - long bones in the limbs, short bones in the wrists and ankles, flat bones like ribs, and irregular bones like the sacrum. Bones are joined by sutures or movable joints. The skull consists of the cranium and facial bones. Vertebrae make up the spine and are separated by discs. The rib cage forms a protective cage around the thoracic organs. The shoulder girdle includes the collarbone and shoulder blades. Hands and feet contain carpals/tarsals, metacarpals/

3.  Support the body
 Protect soft organs
Skull and vertebra for brain and spinal cord
Rib cage for thoracic cavity organs.
 Allow movements due to attached skeletal
muscles.
 Store minerals and fats
Calcium and Phosphorus
Fat in the internal marrow cavity
 Blood cell formation (hematopoiesis)

7. Long Bones -Upper and lower limbs
Short Bones-Carples and Tarsals
Flat Bones-Ribs, Sternum and
Scapula
Irregular Bones-Sacrum, Mandible
and Maxilla
Seasamoid Bones-Patella

10.  Two sets of bone
 Cranium
 Facial bones
 Bones are joined by sutures.
 Only the mandible is attached by a freely
movable joint.

12.  The only bone that doesn’t articulate with another
bone.
 Serves as a moveable base for the tongue.
 Aids in swallowing and speech.

13.  Each vertebrae is given a name according to
its location.
 There are 24 single vertebral bones
separated by intervertebral discs.
 7 cervical vertebrae in the neck.
 12 thoracic vertebrae are in the chest
region.
 5 lumbar vertebra
 9 vertebrae fuse to form two composite
bones: sacrum and coccyx

15.  Forms a cage to protect major organs.
 Consists of three parts
1 Sternum
2 Ribs
True ribs (pairs 1-7 ),False ribs (pairs 8-12), Floating
ribs (pairs 11-12)
 Thoracic vertebra.

17.  Composed of two bones.
1) Clavicle- Collarbone
Articulates with the sternum medially and with
the scapula laterally.
2) Scapula- Shoulder blade
Articulates with the clavicle at the
acromioclavicular joint.

19.  Carples - Wrist
8 bones arranged in two rows of four bones in
each hand.
 Metacarples – Palm
5 per hand
 Phalanges – Fingers & Thumbs
14 phalanges in each hand
In each finger, there are 3 bones.
In each thumb, there are only 2 bones.

21.  Composed of 3 pairs of bone
1) Ilium
2) Ischium
3) Pubis

23.  Smooth-Involuntary, Walls of hollow organs
 Cardiac-Involuntary
 Skeletal- Voluntary, Attached to skeleton

25.  Attached to bones
 Produce voluntary movement of skeleton
 Also referred to as striated muscle
 Looks striped under microscope

26.  Associated with internal organs
 Also called visceral muscle
 Stomach
 Respiratory airways
 Blood vessels
 Called smooth because has no microscopic
stripes
 Produces involuntary movement of these
organs

27.  Also called myocardium
 Makes up walls of heart
 Involuntary contraction of heart to pump
blood