Ch 6.1/2 Fn Skeletal System and Cartilage Flashcards
The fns of the skeletal system
Supports the body Protection (organs) Movement (muscles attach) Storage (minerals and lipids) Site of bl cell production
The skeletal system consists of
Bones
Cartilage
Tendons
Ligaments
_____ produce cartilage and become ______
Chondroblasts
Chondrocyte
Chondrocytes are located in lacunae and are surrounded by
Matrix
The matrix of cartilage contains
Collagen fibers (for strength) Proteoglycans (to trap water)
What surrounds the cartilage?
Perichondrium
What are the 2 layers of perichondrium?
Outer layer
Inner layer
The inner layer of perichondrium contains
Chondroblasts
The outer layer of perichondrium contains
Fibroblasts
What is apposition all growth?
Chondroblasts in the inner layer of perichondrium grow new cartilage on the surface of the cartilage
What is interstitial growth
Chondrocytes within the cartilage divide and produce additional matrix
What are the 2 types of bone formation during fetal development?
Intramembranous ossification
Endochondral ossification
name the 5 fn of the skeletal system
support protection movement storage blood cell production
how does the skeletal system provide support to the body?
bone is well suited for bearing weight
cartilage provides a firm, yet flexible support within certain structures
what are ligaments?
bands of FCT that attach to bones and hold them together
how does the skeletal system protect the body
bones are hard and protect the organs they surround
skull/brain
vertebrae/spinal cord
rib cage/heart, lungs etc
how does the skeletal system support movement of the body?
muscles attach to bones by tendons
cntx of skeletal muscle moves the bones
what are tendons?
bands of FCT that attach muscle to bone
what does the skeletal system store?
Ca++, P, some adipose tissue
how does the skeletal system support blood cell production?
long bone cavities are filled with red bone marrow which makes blood cells and platelets
what are the 3 types of cartilage?
hyaline, fibrocartilage, elastic
cartilage is made of
matrix and cells
what are the cells of cartilage?
chondroblasts
chondrocytes
what are chondroblasts and where are they?
they make new matrix
in areas of growth, repair and development
what are chondrocytes and where are they?
mature chondroblasts
support the matrix
lie in the lacuna in established, mature cartilage
what is the matrix of cartilage made of?
proteoglycans
collagen
protein fibers
what is the perichondrium
surrounds cartilage
made of DFCT
what are the 2 layers of the perichondrium made of?
outer layer, irregular DFCT
inner layer of chondroblasts
what is different about articular cartilage?
no perichondrium
what is appositional chondral growth?
growth by adding to the surface by chondroblasts in the perichondrium
what is interstitial growth
chondrocytes in the matrix can divide and add matrix between cells
