Skeletal System

• forms framework to support muscle’s fat, and skin • surround vital organs to protect them • muscles attach to bones to help provide movement bones help produce red and white blood cells and platelets • store most of calcium supply of the body in addition to phosphorus and fats.

long shaft bone

two extremities or ends

a cavity in the diaphysis filled w/ yellow marrow

storage area for fat cells, contains cells that form leukocytes or white blood cells

found in certain bones such as vertebrae, ribs, sternum, cranium and proximal ends of the humerus and femur; produces blood cells

tough membrane covering outside of bone, contains blood vessels, lymph vessels, and osteoblasts (special cells that form new bone tissue). Necessary for bone growth repair, and nutrition.

section of skeletal system, forms the main trunk of the body, and is composed of the skull, spinal column, ribs, and breastbone.

forms the extremities and is composed of the shoulder girdle, arm bones, pelvic girdle, and leg bones

spherical structure that surrounds and protects the brain, 8 bones

spaces called “soft spots,” allow for the enlargement of the skull as brain growth occurs, made of membrane & cartilage & turn into solid bone by 18 months of age. 14 facial bones

areas where the cranial bones have joined together

air spaces in the bones of the skull that act as resonating chambers for the voice, lined w/ mucous membranes

openings in bones that allow nerves & blood vessels to enter and leave the bone

composed of 26 bones that protect the spinal cord and provide support for the head and trunk, include 7 cervical (neck), 12 thoracic (chest) , 5 lumbar (waist), 1 sacrum (back of pelvic girdle), and 1 coccyx (tailbone)

Breastbone is the last bone of the axial skeleton, contains 3 parts: manubrium, gladiolus, and the xiphoid process

2 collarbones, makes up the shoulder (pectoral) or girdle

shoulder bones, provide for the attachment of the upper arm bones

part of the spinal column, 7 cervical (neck) bones

part of the spinal column, 12 thoracic (chest) bones

part of the spinal column, 5 lumber (waist) bones

1 bone; upper part of the bone arm

1 bone; lower arm on thumb side that rotates around the ulna to allow the hand to turn freely.

1 larger bone of lower arm w. a projection called the olecranon process at its upper end, forming the elbow