A Text book of Vegetable And Animal Physiology Designed for the Use of Schools
The book A Text book of Vegetable And Animal Physiology Designed for the Use of Schools was written by author Henry Goadby Here you can read free online of A Text book of Vegetable And Animal Physiology Designed for the Use of Schools book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Text book of Vegetable And Animal Physiology Designed for the Use of Schools a good or bad book?
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76. Fibres of cotton (Gossipium herbaceum). Hairs of plants. FIG. 78. 257. These stalked hairs are either composed of a single cell, with a dilatation at the apex (Fig. 76, A), or of several cells united to- Fig. 77. Gether, the upper one being the secreting organ (Fig. 76, B). In place of a single terminating secreting cell, there are occasionally two (Fig. 76, C), or more (D). 258. Hairs sometimes serve as ducts through which the secretion Of glands is discharged ; these are glandu- lar hairs..., with the secreting cells at the base. Such hairs are found in the ommon nettle (Fig. 77), in Loasa, or Chili nettle, and in Malpighia, and are usu- ally called stings. 259. In the Nettle (Urtica dioi- ca), they consist of a single conical cell, dilated at its base (see Fig. ), and closed at first at the apex by a small globular button placed ob- liquely (a). This button breaks off on the slightest touch, when the Hah^uS^i snar P extremity of the hair enters oica (nettle), the skin, and pours into the wound the irritating fluid which has been pressed out from the elastic epidermal cells at the base.
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