LIST OF ILLUSTRATIONS xiii 



FIG. PAGE 



165. Group of cells from red marrow of a human rib . . . . 173 



166. Primary changes in intracartilaginous bone formation . . 176 



167. Developing bone 178 



168. Transection of a developing rib . . . . . .180 



169. Intramembranous bone formation ....... 182 



170. Diagram of a mucous membrane . . . . . . .185 



17.1. Mucous and serous secreting tubules . . . . . .187 



172. Simple tubular glands 190 



173. Convoluted tubular glands (coil glands) 191 



174. Reconstruction of a compound tubular gland . . . .192 



175. Reconstruction of tubulo-alveolar gland ..... 192 



176. Reconstruction of the terminal ducts of a tubulo-acinar or race- 



mose gland .......... 192 



177. Compound saccular glands . . . . . . . .194 



178. The epidermis 198 



179. Transection of the skin of the human finger ..... 200 



180. Epidermis, showing " epidermal fat " 202 



181. Abdominal integument of an infant ...... 206 



182. Sudoriparous gland of human finger ...... 207 



183. Finger nail in longitudinal section ...... 208 



184. Transection through .the margin of a finger nail .... 209 



185. Five stages in the development of a human hair .... 212 



186. Skin of infant's arm, showing small immature hair follicles 



in transection 213 



187. The human scalp 217 



188. Transection of a hair near the middle of the root sheath . . 217 



189. The human scalp, showing hairs in longitudinal and oblique 



section . . . . . . . . . . .218 



190. Regeneration of hair 221 



191. Sebaceous glands . . . 222 



192. Reconstruction of cutaneous blood vessels 224 



193. Respiratory mucosa of the human nose . . . . . 227 



194. Olfactory mucosa of a cat ........ 229 



195. Olfactory mucosa of man 230 



196. Nerve endings in the olfactory mucosa . . . . .231 



197. Vertical section through lateral wall of the human larynx . . 232 



198. Transection of the wall of a child's trachea 234 



199. Reconstruction of a tubulo-alveolar gland of the human trachcal 



mucosa ........... 235 



200. Large bronchus .236 



201. Bronchus from the human lung 238 



202. Section of child's lung, alveoli and bronchioles .... 240 



203. Section of child's lung, small bronchi and bronchioles . . . 241 



204. Section of child's lung, terminal bronchioles .... 242 



205. Two alveoli of a child's lung 243 



206. Transection of the pleura .... .244 



207. Section of pleura of man, elastic tissue 244 



