Occurrence and Morphological Structure

The specific elements of connective tissue called elastic fibers are characterized by their high refractivity, their homogeneous filamentlike or ribbon- 

The form in which elastin is laid down varies considerably in the different types of elastic tissue. Membranes with a very high elastin content are found in the walls of the larger arteries, in some parts of the heart, and in the trachea and bronchi. In the larger arteries the structural units of the elastic tissue formation are concentric lamellae which are often of rather variable thickness and always contain many irregular openings. In the ligamentum nuchae of some animals, particularly the ox, the structure is quite different and thick longitudinal elastic fibers, of almost circular cross section, form most of the tissue. 

CSeotion IV, B) and its affinity for dyes with a predominantly acidic or basic function is low, regardless of the pH of the solution. 

In connective tissue diseases, particularly skin carcinoma and degenera- 

Probably because of the ease with which they can be prepared, purified fiber preparations from bovine ligamentum nuchae have formed the starting point of most chemical investigations of elastin. These preparations how- 

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