Anatomy, descriptive and applied.

  • Gray, Henry, 1827-1861.
Date:
1909
Catalogue details

Licence: In copyright

Credit: Anatomy, descriptive and applied. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    40/1346 (page 22)
    Superficial flattened cells it imbibes its nutritive fluids, being itself destitute of blood-vessels. It contains no nerves. Its intimate structure is very simple. If a tliin slice be examined under the microscope, it will bo found to consist of cells of a rounded or bluntly angular form lying in groups of two or more in a granular or almost homogeneous matrix (tig. 27). The cells, when arranged in groups of two or more, have generally straight outlines where they are in contact with each other, and in the rest of theu circumference are rounded.' They consist of clear translucent P^«t«Pl^«™; J fine iirtcrlacing filaments and minute granules are s^.^^f J^^^'^'^^f,^^ in this are one or two round nuclei, having the usual intranuclear networks Ihe cells are contained in cavities in the matrix, called carttlage lacunar ■ aromid these ?he matrix is arranged in concentric Unes, as if it had been formed in successive portions around the cartilage-cells. This constitutes the so-called caf ule oi the space Each lacuna is generally occupied by a single cell, but during the division of the cells it may contain two, four, or eight cells. The matrix is transparent and apparently vvithout structure, or else presents a dim y granular appe^ance, Uke grormd glass Some obser^^rs hje sho.m that the matrix of hyaUne cartilage, and especially of the articular variety, after prln' d r^aceration,^an be broken up into fine fibrils. These fibrils are prob- ablv of the same natire, chemically, as the white fibres of connective tissue It fs beUeved by some histologists that the matrix is permeated by a number of fine cSUh connect tfi lacun. with each otl^er^a^^*^^^^^^^^^^^^^ j'Kj 28—Vertical section of articular cartilage. of the perichoudriuna, and thus the structm-e is per- meated by a current of nutrient fluid. Articular cartilage, costal cartilage, and temporary car- tilage are all of the hyahne variety. They present minute differences in the size and shape of their cells and in the arrangement of their matrices. In articular cartilage (fig. 28), which shows no tendency to ossification, the matrix is finely granular ; the cells and nuclei are small, and are dis- posed parallel to the surface in the superficial part, while nearer to the bone they become vertical. Articular cartilages have a tendency to split in a vertical direction ; in disease this tendency becomes very manifest, ^^h. f-surf^ of it is exposed to fruition, is no covered P^^^^^.^^f'^^^^^^^^^^^^ b'e traced in nective tissue continuous *| f P^mife en^^^^ and here the cartilage-ceUs are the adult over a «XV.i iScS y ^^^^^^^ the branched connective tissue more or less branched and pass ^^^'^'^^'j. , cartila<Te forms a thin incrus- corpuscles of the. synovia ^'^^^rane. Articuly .^^^ ^^^^^^ tation upon the jomt-surfaces of ^^^^^^^^^^^^^^ and freedom of move- the force of concussions while if^i^^^^^ of the articular surface on ment. It varies in tluckness a^'^^^/f ^ ^ the slu.^^^ ^^^^ ^^^^^^^^ ^^^^ which it Ues; where this is f^f'^J^^f^.'es It appears to derive its reverse being the case on concave '^^^ticul^^^^^^^^ J\ ^^^^^^i,,.,,,, ,,d nutriment partly from the , J?^'j^.^^f,^^ Toynbee haB shown partly from those of the bone P^^^^; V'f;;, ^^'j^^^^^^^^^^ the articular that the miuute vessels of the '^/V^.^^ J J^^^^^^^ lamella dilate and form arches, and .^^f; ^ J^,^^^^^ H o matrix has a tendency In costal cartilage the ce Is and j^^-^^ •V,^J hV thickest parts of the to fibrous striation especially in » f/;,^ ^^^-j^^J ; Li tj^^^^^^^^^^ ^l^^ Vz^^^^^-^i^^^^^ ^ ^^^^^hQs r Vertical rows of cells , Calcified matrix Bone