

TISANE 



1521 



TOBACCO 



Tisane (ie-zahn') [see Ptisan]. Any decoction or 

 beverage having slight curative or restorative qualities. 

 Tissue (tish'-u) [ME., tissue, tissue]. Any web-like 

 structure. Applied generally to the organic elements 

 of a part or organ. i4 In the widest sense of the term, 

 every aggregate of cells which obeys a common law 

 of growth (usually, however, not uniform in its 

 i action) may be termed a tissue." " The term tissue 

 mav be applied par excellence to aggregations of 

 similar cells, which, without any well-derined external 

 form, consist, in whatever direction the section be made, 

 of numbers of cells." T., Adenoid, or Lymphoid, 

 a modified form of retiform connective tissue in 

 which the reticular meshes contain lymphoid cells, 

 which closely resemble pale blood-corpuscles or 

 lvmph-corpuscles, but have a larger nucleus and less 

 protoplasm. This tissue composes the greater part of 

 the lymphatic glands, and is found in the spleen, 

 the tonsils, and the alimentary mucosa. T., Adipose, 

 fattv tissue ; it consists of numerous nucleated vesicles 

 of an average diameter of -^^ of an inch, which are 

 composed of oily matter inclosed in a delicate, struc- 

 tureless membrane, and are lodged in the meshes of 

 the areolar tissue, which, with the blood-vessels, serve 

 to bind the vesicles or fat-cells into round or irregular 

 ma.--es visible to the naked eye. Adipose tissue is 

 copiously supplied with blood-vessels and lymphatics, 

 but no nerve- have been seen to terminate therein. 

 This tissue is distributed very generally throughout 

 the body where areolar tissue is found, but is absent 

 from the subcutaneous tissue of the eyelids, the penis 

 scrotum, the nymphae, and the cavity of the 

 lium. T., Animal, a general name for any of the 

 .res which form the elementary structures of the 

 ly, and of which there are four classes : Epithelial 

 -sues, Connective tissues. Muscular tissues, and 

 -sues. T., Areolar, a form of fibrous con- 

 tive tissue which consists of delicate, soft, elastic 

 hreadsor fibers interlacing in even - direction, and quite 

 olorless. like spun glass. These are intermixed with 

 ine, transparent films, leaving interstices or areolae 

 een them. It is one of the most generally dis- 

 tributed of the tissues, and is continuous throughout 

 he body. T., Basement, the tissue of the basement- 

 nembrane. T., Cancellous, the spongy tissue of 

 >ones. T., Cartilaginous. See Cartilage. T., Cel- 

 ular, texture composed of rounded (or dodecahedral) 

 ells. T., Conducting, in biology, the inner tissue 

 f the stigma and style of a pistil. T., Connective, 

 general term for all those tissues of the body that 

 upport and connect the tissues of the frame. They 

 re divided into three groups: fibrous connective 

 ssue, cartilage, and bone. The fibrous connective 

 i- soft, while cartilage and bone are hard 

 nd dense. All are derived from the mesoderm. 

 '., Corneous, tissue found in the nails, hair, epidermis, 

 tc T., Dental. See Dentine. T., Embryonal 

 onnective. See T. , Mucoid. T.. Endothelial, 

 ie endothelia of the body. T., Epithelial, the 

 lithelia of the body. See Epithelium. T., Erectile, 

 * of a spongy nature, which is expanded when 

 irgid with blood or other fluid. T., Fibro-cellular, 

 «ue in the form of long fibers. T., Fibrous Con- 

 ective, there are three varieties: white fibrous, 

 :llow elastic, and areolar, the variety depending 

 x>n the character of the fibers. The fibers are im- 

 :dded in a matrix or a soft, homogeneous material 

 at contains mucin. The matrix is clouded by acetic 

 id, and when treated with nitrate of silver and exposed 

 the light takes a brownish stain. T., Gelatinous, 

 variety of connective tissue, very abundant in 

 Uua and Ctenophorce. It is secreted by the epithe- 



. 



lium, and contains many migrated cells. T., Ger- 

 minal, the tissue that gives rise to the ova and the 

 spermatozoids. T., Granulation, See Granulation 

 Tissue. T., Inflammatory, tissue formed during in- 

 flammation. T., Interstitial Connective. See T, 

 Areolar. T., Mucoid, Mucous, or Gelatinous, con- 

 nective tissue such as is present in the umbilical cord of 

 the fetus. T., Muscular. See Muscle. T., Nervous. 

 See A'erve. T., Osseous. See Bone. T., Osteo- 

 genic. See Bone. T., Parenchymal, the areolar tis- 

 sues that accompany vessels and nerves into the interior 

 of organs and glands, giving them protection. T., 

 Pitted. See Bothrenchyma ; Taphrenchyma. T., 

 Simple, that having but one or two structural elements, 

 e.g. blood, lymph, epithelium, connective tissue of 

 cartilage and bone, and nervous and muscular tissues. 

 T., Tubular, or Vascular, tissue in the form cf long, 

 cylindric tubes. T., Vegetable, a term used to dis- 

 tinguish the web-like substance which composes vege- 

 table structure. T., White Fibrous, a form of 

 fibrous, connective tissue which is made up of fine, 

 inelastic, transparent, homogeneous filaments, about 

 tbtjito to 2a^55 °f an mcn m thickness. These are 

 usually united in bundles and lamina by the matrix 

 and appear as white threads or films. White, fibrous 

 tissue forms the greater part of ligaments, tendons, fascia 

 or sheaths of muscles, periosteum, etc. T., Woody, 

 tissue composing the woody fibers of plants. T., 

 Yellow Elastic, tissue of a yellowish color r.nd pos- 

 sessing great elasticity, predominating in the liga- 

 mentum subflava, vocal bands, the inner coats of the 

 blood-vessels, and the longitudinal coats of the trachea 

 and bronchi. Viewed with the microscope, it is seen 

 to consist of straight, well-defined, homogeneous, 

 highly-refracting, elastic fibers, and, especially at the 

 broken ends, having a decided tendency to curl up. 



Tit [ME., tit, tit]. The nipple. See Teat. 



Titanium (lit-a' '-ne-nm) [Tirav, Titan]. A metal hav- 

 ing a certain relationship to iron, chromium, and tin. 

 It is extremely infusible and will scratch glass. Sym- 

 bol Ti, at. wt. 48.I. Its medicinal properties are not 

 well understood. See Elements, Table of. 



Titillation (tit-il-a' -shun) \titillatio ; titillare, to tickle]. 

 The act of tickling ; a momentary or transient ex- 

 citation. 



Titration (tit-ra' '-shun) \¥r.,titre, standard of fineness]. 

 Volumetric analysis by the aid of standard solutions. 



Titubating (tit' ' u-ba-ting) [titubare, to stagger]. A 

 term applied to the gently swaying ataxia of cerebellar 

 disease and posterior spinal sclerosis. 



Titubation (tit-u-ba / -shuu) \titubatio ; tibubare, to stag- 

 ger]. I. The staggering gait and incoSrdination of 

 motion accompanying certain diseases of the spine 

 and cerebellum ; also, the staggering gait of the drunk- 

 ard. 2. Restlessness, or inquietude. 3. In biology, 

 Dujardin's name for pedesis, more commonly known 

 as Brownian motion, or molecular motion. 



Tizwin (tiz'-win) [Am. Ind.]. An intoxicating drink 

 made by the Apaches and other Indians from some 

 species of yucca. 



Tlalsahuate (tlal-sa-hwa' -te) [Mex. Ind.]. See Tet- 

 ranychus tlalsahuate, Lemaire, under Parasites (Ani- 

 mal), Table of. 



Toad (tod) [ME. , lode, toad]. A tailless, terrestrial 

 batrachian or amphibian. T.-flax. See Antirrhinum 

 linaria and Linaria. 



To-and-fro Sound. See Auscultatory Sounds. 



Toast (tost) [ME., tosten, to toast]. Bread browned 

 by the fire. T. -water, water in which toasted bread 

 has been steeped ; it is used as a beverage by in- 

 valids. 



Tobacco (to-bak'-o) [Sp. , tabaco, tobacco] . See Taba- 



