Amakiri S F, Adepoju J J
Acta Anat (Basel). 1979;105(2):140-50. doi: 10.1159/000145118.
The morphology of apocrine sweat glands in two breeds of cattle, the White Fulani and Friesian was studied histologically using biopsy midside skin samples obtained from the animal at 6.00 a.m. (period 1), 2.30 p. m. (period 2) and 4.00 p. m. (period 3), respectively. Sweat glands with three morphologic types of epithelium were observed. Type 1 consisted of flattened low cuboidal epithelium. Type 2 had tall cuboidal epithelium with cell apical borders slightly indented and the gland lumen narrower than in type 1. A third group of glands had tall columnar epithelial cells (type 3) with bleb-like protuberances on their luminal surfaces. There were also corresponding changes in the morphology of myoepithelial cells from an elongated form in type 1 to a contracted form in types 2 and 3. The morphology of secretory cell surfaces was found to vary with the sampling period; a greater percentage of type 1 glands was seen in period 1 and a preponderance of types 2 and 3 glands (in varying proportions) in periods 2 and 3. Breed differences in the distribution of type of epithelium at various sampling periods were observed. These results are discussed in relation to the functional activity pattern of the sweat glands on stimulation by heat.
分别在上午6点（时段1）、下午2点30分（时段2）和下午4点（时段3）从白富拉尼牛和弗里西亚牛这两个品种的牛身上获取体侧皮肤活检样本，对其顶泌汗腺的形态进行了组织学研究。观察到具有三种形态类型上皮的汗腺。第1型由扁平的低立方上皮组成。第2型具有高立方上皮，细胞顶端边界略有凹陷，腺腔比第1型窄。第三组腺体具有高柱状上皮细胞（第3型），其管腔表面有泡状突起。肌上皮细胞的形态也有相应变化，从第1型的细长形变为第2型和第3型的收缩形。发现分泌细胞表面的形态随采样时段而变化；在时段1中观察到第1型腺体的比例更高，而在时段2和时段3中第2型和第3型腺体占优势（比例不同）。观察到在不同采样时段上皮类型分布的品种差异。结合热刺激下汗腺的功能活动模式对这些结果进行了讨论。
