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acetic acid anastomosing animals appear articular become blastema bone bundles canaliculi cartilage cartilage-cells cartilaginous cavities cell-development cell-membranes colour connective tissue consists contain contents corium corpuscles dark-bordered delicate diam diameter distinct dura mater elastic fibres elements elongated embryo epidermis epithelium exist external fasciculi fat-cells fibrils fibrous fluid formation frequently fusiform ganglia glandular granular granules grey substance hair hair-sacs Haversian canals homogeneous horny layer inner isolated lacunae lamellae laminae larger latter ligaments longitudinal mater matrix medulla medullary membrane mucous layer muscles muscular fibres nail nerve-cells nerve-fibres nerve-tubes nerves nervous nucleated nuclei numerous observed occur organs osseous osseous tissue ossifying outer pale papillae periosteum pia mater plexus portion posterior present processes readily root-sheath roots round sarcolemma sarcous elements Schwann sebaceous glands sheath skin smaller soda spinal cord stratum Malpighii striated structure sudoriparous surface synovial membrane takes place tendons terminal thicker thickness transparent transverse section vascular vesicles vessels whilst
Page 189 - ... at the end of the third or at the beginning of the fourth month, upon the forehead and eyebrows. They consist of papilliform masses of cells 0-02'
Page 211 - The duct has often a distinct cavity in the epidermis, at other times there is a granular streak in the place of it, which is probably either a secretion or a deposit from the secretion. The sweat-pores, whose disposition, corresponding with that of the glands, is sometimes very regular, at others more irregular, are distinguishable, even with the naked eye, in the palm of the hand and sole of the foot. In other localities they are visible only with the aid of the microscope; occasionally the excretory...
Page 467 - ... in size ; in Man, they are constantly found on the cutaneous nerves of the palm of the hand and sole of the foot...
Page 375 - The cells appear to have increased in size at the cost of the processes which existed at an early stage of development and formed a bond of union between them. Everywhere about growing bone, a careful examination will reveal cells attached to its surface, while the surface of the bone itself will present a series of similar bodies ossified. To these we propose to give the name of osteal cells, as distinguished from lacunal and other cells. In microscopic characters, the osteal cells closely resemble...
Page 136 - ... differs in different persons and in different parts of the body. It is deepest around the nipple, especially in women during pregnancy and after they have borne children. A more or less dark pigment...
Page 467 - ... situated between the cells inclosed by the capsule. B. THE HAIR. The hair and nails are regarded as special differentiations of the skin. Hair is found distributed over almost the entire extent of the skin, varying, however, in quantity and arrangement in different regions. None whatever is present in the palm of the hand and sole of the foot. In the third fetal month small papillary elevations of the skin are seen to develop in those areas in which the hairy growth later appears. Under each...
Page 367 - To this class belong, the upper half of the expanded portion of the occipital bone, the parietal, and frontal bones, the squamous portion and tympanic ring of the temporal bone, the nasal, lachrymal, malar and palate bones, the upper and lower jaw, the vomer, and apparently, the internal lamella of the pterygoid process of the sphenoid, and the cornua sphenoidalia.
Page 5 - ... obtain a general view of all the divisions of the animal kingdom, and then, by the methods above described, strive to develop their laws. As regards the general propositions of Histology, the science has made no important progress since Schwann, however much has been attained by the confirmation of the broad outlines of his doctrines. The position that all the higher animals at one time consist wholly of cells and develop from these their higher elementary parts, stands...
Page 388 - ... sheaths or not. Within the structureless sheath, lies the nerve-medulla, or pulp, ("medullary sheath," Rosenthal and Purkinje, "white substance," Schwann), (fig. 137, 3, b, fig. 139, 3, 4, b) in the form of a cylindrical tube, closely and exactly surrounding the central fibre. In the recent nerve-fibre this substance is perfectly homogeneous, fluid, but viscid like a thick oil, and, according to the light by which it may be viewed, transparent and clear, Fig. 137. Nerve-fibres, x 350 diam.
Page 358 - ... only recognisable cartilage cells. They occur singly or in groups, more frequently however two or three are extended in a line. It is proposed in the present communication to call these bodies granular cartilage cells, as distinguished from a form which the cells assume previous to ossification. Cartilage previous to its conversion into bone undergoes a rapid growth, which takes place principally in the direction of the long axis of the future bone. Each granular cell becomes divided into two...