Post on 26-Dec-2015
THE SKELETAL SYSTEMenter the world of bones
THE SKELETAL SYSTEMis the human body system
composed of bones and connective tissue in
various sub-systems andformats.
WHAT IS THE SKELETAL SYSTEM?
FUNCTIONS OF THE
SKELETAL SYSTEM :
support for the body
protection of vital organsconnection of muscle system
-which enables movement
storage of vital minerals
production of blood cells
STRUCTURE OFTHE SKELETAL
SYSTEMparts, function and variations
ALL ASSIST HUMAN MOVEMENT
BONES● most rigid
connective tissue
● inorganic salts connected to protein fibers
LIGAMENTS● connect bones
to bones
● present in joints
TENDONS● connect bones
to muscles
● dense collections of collagen fibers
The Long Bone
✘ includes the appendages, pelvic girdle, arms, legs, the works
✘ provides locomotion and structure, muscular-skeletal
AXIAL
✘ protects the center: skull, thoracic cage
✘ works more to protect vital organs: brain, heart, pelvis, and central nervous system
APPENDICULAR
VARIATIONS OF THE SKELETAL SYSTEM✘ HYDROSTATIC SKELETON
- lack of skeletal system, uses water-filled sacks as skeleton -roundworms and earthworms, snails- fluid aids in locomotion
✘ ENDOSKELETON-structural, interior skeleton
-humans, echinoderms and vertebrates -calcium carbonate or living tissue
✘ EXOSKELETON-rigid, exterior skeleton-molluscs have calcium carbonate shells for protection-insects have a rigid chitin exoskeleton
skeletal system
HOMEOSTASIS
BONE GROWTH AND RENEWAL
osteoblasts
convert cartilage to hard bone
endochondral ossification
osteoclasts
break down bone
regulate blood calcium levels
osteocytesreplace worn bone
areas
regulate blood calcium levels
ARTHRITISo Rheumatoid or osteoarthritis
o Degeneration of cartilage in joints
o Joint replacement sometimes successful as treatment
o Almost 50% of people 85 and up will be diagnosed with osteoarthritis in the knee
"Arthritis-Related Statistics." Centers for Disease Control and Prevention. Centers for Disease Control and Prevention, 17 Mar. 2014. Web.
Caplan, Geralyn M. "Skeletal System." Skeletal System. N.p., n.d. Web.
Farabee, Michael J., Ph.D. "MUSCULAR AND SKELETAL SYSTEMS." Muscular and Skeletal Systems. Estrella Mountain Community College, 17 Sept. 2006. Web.
Mader, Sylvia S. "Locomotion and Support Systems." Biology. 10th ed. Dubuque, IA: McGraw-Hill, 2010. Print.
works cited