Skeletal System

SKELETAL SYSTEM

Support, Attachment, Protection, Movement, Storage, Diseases

HOW MANY BONES DO WE HAVE? Average adult has

206 Bones Average baby has

approximately 300 bones! (Say Whaaaaaaaaa?!)

Bones are not fully formed/fused until sometime between 13 and 18 years old

INCREDIBLE BONES!!! (I WISH THIS SLIDE DESIGN HAD LOWERCASE LETTERS SO I COULD CAPITALIZE “INCREDIBLE BONES.”

Auditory Ossicles: malleus, incus, stapes Ethmoid Bone: Specifically the Cribriform

Plate Largest Bone: Femur Smallest Bone: Stapes (stirrup)

Pass around example Regeneribs! Periosteum intact, osteoblasts

propogatee Hyoid Bone:

Floating Ribs:

DA BONES

How did I get peer-pressured into swallowing this

giant bone?!

DEM’ BONES, DEM’ BONES GONNA WALK AROUND.

~20% of total body weight 6 main functions of our endoskeleton

Support: shape/framework (framing of a building)Attachment: muscles, tendons and ligamentsMovement: leverage for skeletal musclesProtection: Protects our guts (brain, cord, heart, etc)Blood Cell Production: Hematopoeisis (red marrow)Storage: Mineral storage (esp. Ca+)

ORGANIZATION OF LE’ SKELETON Axial Skeleton

(80)SkullOssicles (malleus,

incus, stapes)Hyoid BoneVertebral columnChest

Appendicular Skeleton (126)Shoulder girdleArms/HandsPelvic GirdleLegs/FeetsBAHAHA!

“feets”

SKULL (A.K.A. CRANIUM) Parts you gotta know!

FrontalTemporalZygomaticEthmoidMandibleMaxillaSphenoidParietalLagrimalNasalOccipital

VERTEBRAL COLUMN Types of

VertebraeCervicalThoracicLumbarSacral

WE’RE ALL CREATED EQUAL . . . . JK. Males =

AwesomeThicker/Longer

limbsLonger digital

bonesBrow RidgePelvic Girdle

Females = Weak SauceNarrower rib

cagesSmaller TeethLess angular

mandiblesLess pronounced

cranial features

DISEASES Bone Cancer Bone Tumors Arthritis Osteoporosis Osteogenesis

Imperfecta Fracture

SimpleCompound

Shoulda had a V8

THE INFAMOUS TERATOGEN! Thalidomide: Pros: Cures

Morning Sickness in Pregnant women.

Cons: Prevents the development of long bones (i.e. arm and leg bones don’t extend)

HOMOLOGY