ANAT 101 Chapter Notes - Chapter 4,6: Bone Marrow, Haversian Canal, Elastic Cartilage
4 Apr 2016
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Document Summary
The matric of cartilage is a firm gel containing embedded fibers. Structures of cartilage are covered and set apart from surrounding tissues by a perichondrium, which contains an inner cellular layer and an outer fibrous layer. The three major types of cartilage are hyaline cartilage, elastic cartilage, and fibrocartilage. Elastic cartilage: contains numerous elastic fibers that make it extremely resilient and flexible, forms the external flap (the auricle, or pinna) of the external ear, the epiglottis, and an airway to the middle ear (the auditory tube) Fibrocartilage: has little ground substance, its matrix is dominated by collagen fibers. The volume of ground substance in bone is very small. The matrix of bone consists mainly of hard calcium compounds and flexible collagen fibers: this combination gives bone truly remarkable properties, making it both strong and resistant to shattering. Lacunae in the matrix contain bone cells, or osteocytes: the lacunae surround the blood vessels that branch through the bony matric.
