Garg V K
Z Mikrosk Anat Forsch. 1979;93(1):182-90.
Iron absorption in both the teleost fishes Ophiocephalus punctatus and Heteropneustes fossilis, initially starts after 2h of feeding the iron diet. However, at this stage, there is no absorption of iron in the posterior intestine of both the fishes. Absorption initially starts along the brush border of enterocytes of the villi. Later, it gets accumulated in the supranuclear region of the epithelial cells and then through these cells, it is transported into the cores of the villi. The absorbed amount ultimately reaches along the bases of the villi. Through the blood capillaries, which are situated in the submucosa, absorbed iron is passed on to the blood stream. Although, the entire intestine of both the fishes is able to absorb iron but the regional variations have been noted. In contrast to the posterior intestine, the anterior and middle intestine of both the fishes show better iron absorption. The pyloric caeca of Ophiocephalus have comparatively less affinity for iron absorption. However, the intestine of Heteropneustes shows more affinity for iron absorption than the intestine of Ophiocephalus.
在硬骨鱼斑鳢和胡子鲇中，铁的吸收在喂食含铁饲料2小时后开始。然而，在此阶段，两种鱼的后肠都没有铁的吸收。吸收最初沿着绒毛肠上皮细胞的刷状缘开始。随后，它积聚在上皮细胞的核上区域，然后通过这些细胞被转运到绒毛的核心。吸收的量最终沿着绒毛底部到达。通过位于黏膜下层的毛细血管，吸收的铁进入血流。虽然两种鱼的整个肠道都能够吸收铁，但已注意到存在区域差异。与后肠相比，两种鱼的前肠和中肠表现出更好的铁吸收。斑鳢的幽门盲囊对铁吸收的亲和力相对较低。然而，胡子鲇的肠道比斑鳢的肠道对铁吸收表现出更高的亲和力。
