C6 1-5 Flashcards
Hyaline - function/fibers
Support with flexibility and resilience (closely packed/fine collagen fibers)
Elastic - function/fibers
Stretchy, resilient, tolerates distortion, returns to original shape (lots of elastic fibers)
Fibrocartilage - function/fibers
Absorb compressive shock (densely packed collagen fibers)
Hyaline - locations
Ribs to sternum, bone surfaces at synovial joints, nasal septum, trachea, bronchi
Elastic - locations
ear, epiglottis (little bit in ear canal and larynx)
Fibrocartilage - locations
knee and intervertebral discs, pubic symphonis
Axial skeleton - function, location
Bones of skull, vertebral column, rib cage. Protect, support or carry other body parts.
Appendicular skeleton - function, location
Upper and lower limb bones, girdles (shoulder and hip bones.) Locomotion/movement
Four bone classes?
Long, short (incl. sesamoid and sutural/wormian) flat, irregular
Long bones - location
Arm, forearm, thigh, leg, palms, soles, fingers, toes (all limb bones except patella and carpals/tarsals)
Short bones - location
Carpals of wrist, tarsals of ankles
Flat bones - location
Roof of skull, sternum, ribs, scapulae
Irregular bones - location
Spinal vertebrae, bones of pelvis, several skull bones
Sesamoid bones - location
small flat bones that develop inside tendons and most commonly located near joints at the knees, hands, feet. (patella)
Sutural (wormian) bones - location
between the flat bones of the skull
Long bone characteristics?
Longer than wide (elongated), has shaft with two ends that are often expanded.
Short bone characteristics?
Roughly cube shaped.
Flat bone characteristics?
Thin, flattened, usually a bit curved
Irregular bone characteristics?
Complicated shapes that do not fit any other category
Sesamoid bone characteristics?
Shaped like a sesame seed
Bone Functions? 7
Support, Protection, movement,
mineral and growth factor storage, triglyceride storage
blood cell formation, , hormone production
Function - Support
Bones form a framework that support the body and cradles soft organs
Function - Protection
Skull protects brain, vertebrae surround spinal cord, rib cage protects vital organs of thorax
Function - Movement
Muscle uses bone as levers to move the body
Function - Mineral and growth factor storage
Reservoir for minerals, notably calcium and phosphate and growth factors
Function - Blood cell formation
Hematopoiesis occurs in red marrow
Function - Triglyceride storage
Fat is stored in bone cavitites (yellow marrow)
Function - Hormone production
Produce osteocalcin (hormone which regulates bone formation, guards against obesity, diabetes, glucose intolerance)
Wormian/sutural - characteristics
small (a grain of sand to size of quarter), flat irregularly shaped bones
Skeleton?
Very dynamic! Bone, cartilage, ligaments and other ct that stabilizes or connects to bone
Skeletal cartilage
Differs from other ct - less diverse cell pop. And more densely packed fibers. Also semi-rigid.
Skeletal cartilage characteristics
Lots of water Avascular/not innervated Perichondrium Chondrocytes and matrix Matrix contains condroitin