Chapter 4
Tissue: The Living Fabric
135
4
(g)
Cartilage: hyaline
Description:
Amorphous but firm matrix;
collagen fibers form an imperceptible network;
chondroblasts produce the matrix and when
mature (chondrocytes) lie in lacunae.
Function:
Supports and reinforces; serves as
resilient cushion; resists compressive stress.
Location:
Forms most of the embryonic
skeleton; covers the ends of long bones in
joint cavities; forms costal cartilages of the
ribs; cartilages of the nose, trachea, and
larynx.
Photomicrograph:
Hyaline cartilage from a costal cartilage
of a rib (470
m
).
Costal
cartilages
Chondrocyte
in lacuna
Matrix
Figure 4.8
(continued)
(g)
and
(h)
Cartilage. (For related images, see
A Brief Atlas of the
Human Body
, Plates 17 and 18.)
(h)
Cartilage: elastic
Description:
Similar to hyaline cartilage, but
more elastic fibers in matrix.
Function:
Maintains the shape of a structure
while allowing great flexibility.
Location:
Supports the external ear
(pinna); epiglottis.
Photomicrograph:
Elastic cartilage from the human ear pinna;
forms the flexible skeleton of the ear (800
m
).
Chondrocyte
in lacuna
Matrix
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