Skeletal System Flashcards
Function of SS - PSPSFS
Protect int organs
Stores and releases fats
Produce blood cells
Stores and releases minerals
Facilitates body movement
Supports the bod
Connects bone-bone
Ligament
Bone structure top to bot
EMD
Epiphysis
Metaphysis
Diaphysis
Space within diaphysis
Medullary cavity
Lines the medullary cavity
Endosteum
Outermost covering of diaphysis
Periosteum
Connects bone-muscle
Tendon
Order bone formation
Osteoprogenitor-osteoblast-osteocyte
Secretes bony matrix and develop into osteocyte
Osteoblast
Get buried under bony matrix
Osteocyte
Get buried under bony matrix
Osteocyte
Top composition of bony matrix
Calcium hydroapatite
50% dry weight of bony matrix
inorganic mats
Why do bones become too brittle
Not enough collagen and too much mineral
Why do bones become too pliable
Not enough minerals and too much collagen
Space within diaphysis
Medullary cavity
Anong tawag if veins are too small and rekta buto ang swero
Intraosseous injection
2 structural bone type
Compact and Spongy
80% of total bone mass, aka?
Compact/cortical
Characteristics and function of compact bones
Sturdy, make bones dense and enables it to withstand pressure
20% total bone mass, aka?
Spongy - cancellous - trabecular
Characteristics and function of spongy bones
Perforated w/ pores, make bones lighter for muscle mobility
Functional unit of compact bones
Osteon
Bone marrow is associated w/ what bones?
Spongy
Irregular bone plates
Spicules or trabeculae
Woven bones are present in..?
Fetal bones, bones, healing bones after fracture
Lamellar bones are created by..??
Remodeling of woven bones
Ossification aka
Osteogenesis
Bones form in 4 situations, ano yon
During embryological and fetal dev
When bones grow b4 adulthood
When bones remodel
When fractures heal
2 types of bone formation
Intramembranous and Endochondral
Explain mo intramembranous ossification
Osteoblast differentiate directly from mesenchyme
Endochondral ossification??
Cartilage serve as scaffold > bone formation > primary and secondary ossification
Examples of bones formed by intramembranous ossification
Skull, jaws, scapula, clavicle
20% total bone mass, aka?
Spongy - cancellous - trabecular
Primary ossification center
Diaphysis
Secondary ossification center
Epiphysis
Epiphyseal growth plate
Responsible for lengthening of bones
5 zones eme
Zones of:
Reserve cartilage
proliferation - mitotically active
hypertrophy - cell grows in size
calcified cartilage
ossification
How does appositional bone growth happens?
Bone resorption by osteoclast and bone deposition by osteoblast
3 phase of healing process
Reactive - reparative - bone remodeling
Formation of hematoma (blood clot)
Reactive phase
Formation of fibrocartilaginous callus and bony callus
Reparative phase
Osteoclast and osteoblast action heal fracture
Bone remodeling
3 types of fracture, explain
Simple - crack lang
Complete - circumferential bali
Compound - shattered
How is calcium released
Bone resorption by osteoclast
Too high calcium
kidney stones
Too low calcium
Rickets sa kids
Osteomalacia sa adults
Hormones lost by post-menopausal women
Estrogen
How many bones?
Sa axial? Appendicular
206 total
80 axial
126 appen
5 types of bones
Long
Short
Flat
Irregular
Sesamoidal
Narrow slit between bones for passage of blood vessels or nerves
Fissure
Hole for passage of blood vessels, nerves, or ligaments
Foramen
Shallow depression
Fossa
Tubelike opening
Meatus
Furrow on bone for passage of blood vessels, nerves, or tendon
Sulcus
Rounded projection w/ a smooth articular surface
Condyle
Smooth, flat, slightly concave articular surface
Facet
Sharp, slender, projection
Spinous process
Rounded articular process supported by neck
Head
Prominent ridge or elongated process
Crest
Roughened projection on condyle
Epicondyle
Long, narrow ridge or border
Line
Large projection found on femur
Trochanter
Variably sized rounded projection
Tubercle
Variably sized projection w/ rough, bumpy surface
Tuberosity
How many bones in skull
22
Moveable bones sa skull
Mandible and ossicle
4 paranasal sinuses
Frontal sinus
Ethmoidal
Sphenoidal
Maxillary
What fontanel closes first
Posterior
Sinuses present at birth
ME
Supports tongue, does not articulate w/ other bones
Hyoid
Sections of the spine and ilang bones
Cervical - 7
Thoracic - 12
Lumbar - 5
Sacrum - 5 fused
Coccyx - 4 fused
Separates the vertebrae from one another
Intervertebral disc
Each disc has on an outer ring of _____ which surrounds ___________
Annulus fibrosus
Nucleus pulposus
2 divisions of cervical vertebrae
Craniocervical junction (CCJ)
Subaxial spine
C1- C2
CCJ
C3- C7
Subaxial spine
C1 is aka
atlas
C2 is aka
axis
Ano meron sa C2 and ano function non
Atlantoaxial joint - head rotation
Hanggang saan ang spinal chord
Lumbar, L2
Vertebrae that supports body’s weight
Lumbar v.
Thoracic bones
Sternum - manubrium, body, xiphoid process
Ilang ribs meron? Ano yung tru and false ribs
12 ribs
7 tru
5 false
Connects (tru) ribs to sternum
costal cartilage
Nucleus pulposus leak out
herniated disc
Nucleus pulposus leak out
herniated disc
Disease: Lateral curvature
Scoliosis
Disease: Thoracic forwards (kuba)
Kyphosis
Disease: Lumbar backwards (liyad)
Lordosis
Skeleton for movement
Appendicular
Where upper limb attach to
Pectoral girdle
Pectoral girdle consist of
Scapula and clavicle
Clavicle articulates with
Medial/ sternal - manubrium
Lateral/ acromial - acromion of scapula
Attachment point for humerus
Glenoid cavity of scapula
Trochlea articulate with..
Ulna
Capitulum articulates with…
Radius
What forms the trochlear notch
Olecranon and coronoid process
Membrane between radius and ulna
Intraosseous membrane
How many bones sa carpal bones
8
Proximal row of carpal bones
SaLamat, Tangina Po
Scaphoid
Lunate
Triquetrum
Pisiform
Distal row of carpal bones
TiTa Christy, Huwait
Trapezium
Trapezoid
Capitate
Hamate
Hip bones components
Ilium
Ischium
Pubic
Connects pubic bones
Pubic symphysis
Largest hip bone
Ilium
Hip bone that carries weight when sitting
Ischium
Head of femur inserts into
Acetabulum
Divides pelvis into superior and inferior; where abdoment meers pelvic cavity
Pelvic brim
Longest, heaviest, and strongest bone sa body
Femur
Kneecap
Patella
Distal femur articulates with..
Tibia
Distal tibia articulates with..
Talus
Ilang bones sa tarsus, enumerate
7
Tiger Cub Needs MILC
Talus
Calcaneus
Navicular
Medial, intermediate, lateral cuneiform
Cuboid (sa pinky)
2 arches ng paa
Longitudinal and transverse arches
Purpose ng foot arch
Distributes weight
Joints function classification
SAD
Synarthroses
Amphiarthroses
Diarthroses
Joints clasification structure
Funny Ca Sis
S-Fibrous
A-Cartilaginous
D-synovial joint
Joints that have no movement
Synarthroses
Joints w/ partial movement
Amphiarthroses
Freely movable joints
Diarthroses
S-Fibrous joints example
Suture (skull)
Gomphosis (teeth)
Syndesmosis (intraosseous membrane)
A-Cartilaginous Example
Synchondrosis (epiphyseal plate) - hyaline cartilage
Symphisis (pubic, intervertebral disc) - fibrocartilage
Ano meron sa synovial joint for lubrication
Articular cartilage, synovial fluid
Mesenchyme filled spaces between cranial bones
Fontanels
Mesenchyme filled spaces between cranial bones
Fontanels