Objectives Chapter.6

Most abundant cartilage

Hyaline

Hyaline areas

Articular (joint), costal (sternum), respiratory(thyroid, cricoid, trachea, lube cartilages, nasal

Hyaline cartilage function 

by providing smooth, resilient, low-friction surfaces in joints to enable movement and absorb shock, while also supporting and maintaining the open structure of the respiratory airways.

Elastic areas

External ear, epiglottis

Two types of cartilage growth

Appositional and interstitial growth.

Fibrocartilage areas

Knee meniscus, intervertebral

Fibrocartilage function

to act as a strong, durable cushion and shock absorber, providing structural support and stability in high-stress areas of the body

Appositional slide/define

New matrix secreted external face of existing cartilage by osteoblast

Appositional function

to increase a bone's diameter and thickness, allowing it to adapt to mechanical stresses and maintain a healthy structure throughout life

Appositional process

is carried out by osteoblasts laying down new bone matrix on the bone's outer surface (periosteal surface) while osteoclasts simultaneously resorb bone from the inner surface (endosteal surface) to maintain the width of the medullary cavity.

medullary cavity define

the hollow, central area within the shafts of long bones.

Medullary cavity found

The central shaft for the long bones, hollow area

Medullary cavity in adults 

Contains yellow bone marrow (primary fat) serves as a energy reserves

Medullary cavity in kids

Contains red bone marrow, responsible for producing rbc

Interstitial slide/define

Chondrocytes inside cartilage divide and secrete new matrix 

Cartilage growth ends during adolescence when skeleton itself stops growing