Hygienic physiology : A textbook for the use of schools / by D.F. Lincoln.
- Lincoln, David F. (David Francis), 1841-1916
- Date:
- 1891
Licence: Public Domain Mark
Credit: Hygienic physiology : A textbook for the use of schools / by D.F. Lincoln. Source: Wellcome Collection.
Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.
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![single shape for cells, as there is in a honeycomb; they are globular, cylindrical, flat, or long like threads. Tissues. —The word tissue'' is often applied to fabrics of silk, cotton, and other material. In the case of the body, it signifies the fabrics or substances that are formed by joining and interweaving the cells and fibres. Fibrous Tissue is a mass of fibres interlaced like felt. Some fibres are elastic ; others are not. Fibrous tissue gives strength and firmness, combined with elasticity where required. It forms a casing for some organs, as the brain and the heart; it forms an envelope for each muscle ; it wraps and ties together the joints ; all the cords'' or sinews are made of it. Epithelial Tissue is composed of cells of various forms ]3acked closely together. It forms the outer layer of the skin; it also forms a lining for the mouth, throat, and many other internal parts. Fatty Tissue contains numerous roundish cells filled with fat; between the cells there are meshes or bundles of fibrous tissue. Bony Tissue (represented in Pigs. 1 and 2, pp. 6, 7) is pecul- iar in having its substance mostly filled somewhat solidly with mineral matter; it has, however, numerous little cavities, with passages connecting them. Muscular and nervous tissue is described later. The structure of plants is in many ways like that of living creatures. They contain cells and fibres in abundance, and of many sha]3es and sorts. The human body has in reality a kind of life like that of a plant; but it has much more besides. Membranes. — The general meaning of this word is a thin, skin-like structure; thus, there is a membrane on the inside of an egg-shell. In the body there is a variety of membranes, composed of cells and fibres ; they may be considered as a sort of skin, serving to line the cavities and passages in the inte- rior of the body. The most important one is the mucous mem- brane, which lines the mouth, nose, inner ear, eye, throat, air- passages, stomach, and intestines.](https://iiif.wellcomecollection.org/image/b21214736_0016.jp2/full/800%2C/0/default.jpg)
