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Skeletal System

Terms & Definitions involved with the Skeletal System for Anatomy & Physiology

Functions of the Skeletal System Support, Structure, Storage, Creates red blood cells, Attachment site for muscles & Leverage for the body.
Axial Skeleton Made up on the skull, spine, & rib cage
Appendicular Skeleton Made up of arms, legs, pelvis & shoulders
Four Classifications of Bones Long, Short, Flat, & Irregular
Long Bones These bones are longer than they are wide and they are strong bones that provide structure and mobility.
Short Bones These bones are as long as they are wide and mainly in the hands and feet.
Flat Bones These bones are somewhat flatten and may provide protection.
Irregular Bones These bones that vary in shape and structure
Greenstick Fracture This occurs when the bone breaks and cracks, but it does not break completely into separate pieces. This type of break usually occurs in children.
Compression Fracture This can occur in the spine. It is when the vertebral body of the spine collapses. This can lead to severe pain, deformities and even loss of height.
Spiral Fracture When a long bone breaks from a twisting force. It may lead to the person needing surgery, rest and physical therapy.
Transverse Fracture When this occurs at a right angle to the long plan of the bone. Usually occur as a result of strong force applied perpendicular to the long axis of the bone.
Compound Fracture It is when a bone is pierces through the skin causing an open wound or break in the skin where the bone ends may be visible.
Osteoporosis A disease that occurs when the body loses too much bone mass, which results in weak bones that may break from falls or bumps.
Leukemia Is a blood cancer caused by a rise in the number of white blood cells in your body.
Osteopenia This is a condition that begins as you lose bone mass in your bones and they become weaker. It is common to develop as you age.
Scoliosis It is a sideways curvature of the spine. In some cases, it can be corrected with a back brace.
Joint A place where two or more bones meet
Examples of Long Bones Tibia, Femur, Fibula, Ulna, Radius, Humerus
Examples of Short Bones Carpals, tarsals
Examples of Flat Bones Ribs, Pelvis, Sternum, Scapula
Examples of Irregular Vertebrae, Patella
Fixed Joints Unable to move
Slightly Moveable Joints Able to move a bit
Freely Moving Joints Able to move completely
Hinge Joint A type of joint that only allows bones to move in one direction back and forth with limited motion along other planes.
Examples of a Hinge Joint The fingers, toes, elbows, knees, and ankles
Ball & Socket Joint An articulation in which the rounded head of one bone fits into a cuplike cavity of the other and admits movement in any direction.
Examples of a Ball & Socket Joint The hip and shoulder
Saddle Joint The bone forming one part of the joint is concave (turned inward) at one end and the other bone's end is convex (turned outward).
Example of a Saddle Joint Thumb
Pivot Joint The rounded end of one bone fitting into a ring formed by the other bone. This structure allows rotational movement.
Examples of Pivot Joints Atlas & Axis, wrist
Bones of the Arm humerus, ulna, radius, carpals, metacarpals, phalanges
Bones of the Leg femur, patella, tibia, fibula, tarsals, metatarsals, phalanges
Created by: CMacKay16
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