Cell

(sel). I. In anatomy, any one of the interstitial spaces and small cavities of the bones, etc. 2. In biology, a nucleated ma of protoplasm capable of reproduction. A ma of protoplasm, with or without a cell-wall and with or without a nucleus. 3. A galvanic element, or single member of a galvanic battery without the connecting wire between the metals. See Battery . 4. The case or cup in which a zooid or larva is located. See Cell-body. C, Abbe-Zei Counting, a gla receptacle cemented upon a gla slide, its floor being marked in microscopic squares. It is used for counting the blood-corpuscles. C, Air. See Air-cell. C, Ameboid, a cell capable of changing its form and of moving about like an ameba. C, Apolar, a nerve-cell without proce es or poles, such as has been ascribed to the sympathetic system. C, Beaker. See C, Goblet. C, Betz's, the motor or ganglionic cells comprising the fourth layer of the motor area of the gray matter of the brain. C.-body, the ma of a cell, composed of two substances, the mitoma, or cytomitoma, and the paramitoma. The first is the thread-like basis of the cell body, the latter, the homogeneous filar and inter filar substance. The nucleus is composed of the karyomitoma, or nuclear network, otherwise called the chromatin; the nuclear sap, or substances contained in the meshes of the chromatin, and from its non-staining quality called achromatin: and the nuclear membrane, made up of two layers, the outer achromatic, the inner chromatic, or staining. The nucleoli are usually multiple, and are composed of more refractile matter. C, Bunsen, the same as the Grove cell except that the platinum electrode of the latter is replaced in the Bunsen by a stick of carbon. C. -capsule, a thick or unusually strong cell-wall. C, Ciliated, one provided with cilia. C. of Corti, any one of the hair cells on the outer surface of the organ of Corti. C, Cylindrical, a variety of epithelial cell. C, Daniell's, a battery cell containing two fluids, viz., a saturated solution of sulphate of copper and a semi-saturated solution of sulphate of zinc. In the former is placed a sheet of metallic copper, and in the latter a ma of zinc, these two metals forming the electrodes of the cell. C, Daughter-, a cell originating from the division of the protoplasm of a mother-cell; any one of the young cells found within the substance of an undivided mother-cell. C.