MSK Flashcards
What are the functions of the skeletal system?
-Support
-Protection
-Movement
-Mineral Homeostasis
-Blood Cell production (red bone marrow)
-Triglyceride storage (yellow bone marrow)
Four types of bones?
-Long bones
-Short bones
-Flat bones
-Irregular bones
What are the parts of long bone?
-Diaphysis= the shaft
-Epiphyses= ends of the long bone
-Metaphyses= contains the “growth plate” and is located between the shaft and end of bone
What are the cells of bone?
-Osteoblasts: bone building cells
-Osteocytes: maintain bone; exchange nutrients and wastes with blood; are osteoblasts encased in matrix they build
-Osteoclasts: Digest bone matrix for normal bone turnover
What are the types of joints?
-Fibrous
-Cartilaginous
-Synovial
What are fibrous joints?
No cavity, just dense irregular connective tissue
What are cartilaginous joints?
No cavity, bones are held together by cartilage
What are synovial joints?
Have synovial cavity and many other components such as ligaments
What are synovial joints?
Have synovial cavity and many other components such as ligaments
What are the functions of ligaments?
-Composed of connective tissue
-Found throughout the skeletal system
-Function to connect bone to bone
-Commonly injured by spraining or tearing
What are the functions of tendons?
-Tough band of fibrous connective tissue
-Function to connect muscle to bone: skeletal muscles contracts and moves bones via tendons; very dense and more capable of withstanding tension
What is the function of cartilage?
-Covers ends of bones
-Absorbs shock
-Reduces friction
(cartilage is in the joint, but it is NOT a cartilaginous joint)
What is the function of bursa?
-Decreases friction
What are the different types of musculature in the body?
-Skeletal Muscle
-Cardiac Muscle
-Smooth Muscle
What are the major functions of the muscle systems?
-Produce body movements
-Stabilize body positions
-Store and move substances
-Produce heat
Define flexion.
Decrease in the angle between articulating bones
Define extension.
Increase in angle between articulating bones
Define Hyperextension.
Bending beyond 180 degrees, such as moving humerus backwards behind the anatomical plane
Define Abduction.
Movement of bone away from the midline
Define Adduction.
Movement of bone toward the midline
Define Circumdunction.
Movement of distal end in a circle
Define Rotation.
Bone revolves around its own longitudinal axis
Define Inversion.
Movement of the soles of the foot medially
Define Eversion.
Movement of the soles of the foot laterally