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Skeletal system/joints (Synovial joints (Synovial fluid (nourishes…
Skeletal system/joints
Components of long bone
35% organic
carbon containing
cells
extracellular matrix
Collagen fibers
strength
flexibility
65% Inorganic
minerals
Resists compression and twisting
hardness
Ligaments
connect bone to bone
Dense Regular Connective Tissue
Tendons
connect muscle to bone
Dense Regular Connective Tissue
Articulation
Two bones meet
Joint
Cartilage
costal = ribs
Bone Cells
Osteoblast
create bone extracellular matrix in growing bone and remodeling bone
Osteocytes
dead osteoblast
maintain healthy bone tissue
Osteogenic
Stem cells
Differentiate
Stem cells
Osteoblast
Location
Periosteum
endosteum
Osteoclast
Origin is a type of leukocyte
5 - 20 cells that fuse together form one large osteoclast
Have microvilli for breaking down bone
Break down bone by secreting enzymes through microvilli
Enzymes
break down organic part of bone
liberates minerals to be reabsorbed into the blood
organic bits of bone are taken up by the osteoclast and broken down
Fibrous and Cartilaginous joints
Fibrous
Suture
Very short interconnecting fibers
Location
Skull only
Movement
no movement(in adults)
Fontanelles
membranes - between cranial bones in infants
Syndesmosis
Short connecting fibers
location
distal tibiofibular joint
Movement
little movement
Function
holds two bones together
Gomphosis
Short connecting Fibers
Periodontal ligaments
Location
where teeth and mandible/maxilla
Movement
No movement
Cartilaginous
Synchondrosis
Hyaline cartilage
Location cartilage
epiphyseal plates
between 1st rib and menubreum
Movement
No movement
Symphysis
hyaline cartilate
Fibrocartilage
Location
intervertebral joints
pubic symphesis
Movement
Little movement
Synovial joints
Hyaline cartilage
Synovial membrane
produce synovial fluid
Synovial fluid
fill joint cavity
lubricating
reduces shock
nourishes articular cartilage
composed of hyaline cartilage
Dense Iregular Connective Tissue
Joint Capsule
Dense Irregular Connective Tissue
continuous with periosteum
Aeolar Connective Tissue
Synovial membrane
Fibrocartilage
Menisci of knee
Function
shock absorbers
helps fit of bones in the joint
Bursae
synovial membrane in a sac
Filled with synovial fluid
Reduces tension
bone and skin
bone and tendons
bone and ligaments
bone and muscle
tendon sheath
Bursa with a specific shape
hotdog shape
wraps around tendons
found in places where many tendons come together in one place
piece of hyaline cartilage that divides a joint
Ex: Temporomandibular joint
Function
produce more than one movement