Bones Flashcards
Parts of the skeletal system
1) bones
2) ligaments
3) cartilages
All parts of skeletal system are _____ tissue
Connective
Connective tissue characteristics:
Cells scattered far apart
Abundant amount of extracellular matrix
Skeletal system functions (5 in total)
1) Provides framework
2) protect delicate organs
3) store minerals
4) act as levers
5) site of blood cell production
Examples of delicate organs that bones protect:
Brain, spinal cord, eye, thoracic organs, and some pelvic ofgabs
What abundant mineral do bones store and for what purpose?
Calcium
Allows for its retrieval when needed
Keeps blood-calcium levels constant
How do bones act as levers?
Provides movement that occurs through muscle contractions
Process in which red blood cells are produced:
Erythropoiesis
What hormone controls the production of red blood cells and what regulates it?
Erythropoietin
Produced by the kidneys
2 groups of bones:
Appendicular
Axial
Axial Skeleton definition and example
Bones along the center axis
Skull, hyoid vertebra, rib cage, sternum
How many axial bones are there in an adult
80
Appendicular skeleton definition and example
Appendages subdivided into two groups:
Upper extremities
Lower extremities
Girdles
Bones that anchor appendages to axial skeleton
Also part of appendicular skeleton
How many bones are in appendicular skeleton?
126
