tendons & ligaments anatomy i. ligaments add to the mechanical stability of joints guide joint...
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TENDONS & LIGAMENTSANATOMY I
LIGAMENTS
• Add to the mechanical stability of joints
•Guide joint motion
• Prevent excessive motion
Ligaments• Ligaments link bones
together.
• Some very common ones that are damaged are the ones surrounding the knee (the crutiate and medial ligaments)
• Type of connective tissue
LIGAMENTS
• TENSION IN LIGAMENTS AND MUSCLES CONTRIBUTES SIGNIFICANTLY TO JOINT STABILITY(ESPECIALLY IN THE KNEE AND SHOULDER)
• LIGAMENT RUPTURE OR STRETCHING CAN RESULT IN ABNORMAL MOTION OF ARTICULATING BONE ENDS
LIGAMENTS
• Are responsible for holding joints together. They prevent bones moving out of position during the stresses of physical activity.
• If they are pulled or twisted too far by extreme physical movements, ligaments can tear andthe joint may dislocate
TENDONS
• ANOTHER TYPE OF CONNECTIVE TISSUE
• TENDONS TIE MUSCLE ONTO BONE AND ALLOW THE MUSCLE TO WORK THE BONE AS A LEVER. (ACHILLES TENDON – ATTACHES THE CALF MUSCLE TO THE HEEL BONE. WITHOUT IT, WE COULD NOT WALK)
TENDONS
• ANCHOR MUSCLES TO BONES, ALLOWING THE MUSCLES TO MOVE THE SKELETON.
• TENDONS ARE NOT VERY ELASTIC – IF THEY WERE, THEN THE FORCE PRODUCED BY MUSCLES WOULD BE ABSORBED INSTEAD OF CREATING MOVEMENT.
• TENDONS CAN ALSO BE TORN IF SUBJECTED TO TOO MUCH FORCE
CARTILAGE
•Specialized connective tissue
•Rigid, Elastic, Resilient
• RESISTS COMPRESSIONAVASCULAR: nutrients diffuse through matrix
CARTILAGE
EMBRYO• MORE PREVALENT THAN IN
ADULT
• SKELETON INITIALLY MOSTLY CARTILAGE
• BONE REPLACES CARTILAGE IN FETAL AND CHILDHOOD PERIODS
LOCATION OF CARTILAGE IN ADULTS
• EXTERNAL EAR
• NOSE
• “ARTICULAR” – COVERING THE ENDS OF MOST BONES AND MOVABLE JOINTS
• “COSTAL” – CONNECTING RIBS TO STERNUM
• LARYNX - VOICE BOX
LOCATION OF CARTILAGE IN ADULTS(CONT’D)
• EPIGLOTTIS – FLAP KEEPING FOOD OUT OF LUNGS
• CARTILAGINOUS RINGS HOLDING OPEN THE AIR TUBES OF THE RESPIRATORY SYSTEM (TRACHEA AND BRONCHI)
• INTERVERTEBRAL DISCS
• PUBIC SYMPHYSIS
• ARTICULAR DISCS SUCH AS MENISCUS IN KNEE JOINT