There
are three types of cartilage in the human body: 1) hyaline cartilage; 2)
elastic cartilage; and 3) fibrocartilage. Hyaline cartilage (from the Greek hyalos, meaning “glass”) is the most common type of cartilage in the
body. It has a translucent, pearly, blue-white appearance resembling glass.
Hyaline cartilage provides stiff but flexible support and reduces friction
between bony surfaces. It is found between the tips of the ribs and the bones
of the sternum, at the end of the long bones, at the tip of the nose, and
throughout the respiratory passages. Elastic cartilage is similar to hyaline
cartilage except it is very flexible and resilient. It is ideal for areas that
need repeated bending and stretching. Elastic cartilage forms the external flap
of the outer ear and is found in the auditory canal and epiglottis.
Fibrocartilage
is often found where hyaline cartilage meets a ligament or tendon.
It
is found in the pads of the knees, between the pubic bones of the pelvis, and
between
the spinal vertebrae. It prevents bone-to-bone contact.
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