Ultrastructure of the midgut epithelium in <i>N</i>. <i>davidi</i>.

<p>TEM. Mitochondria (m), midgut lumen (l), microvilli (mv), nucleus (n), cisterns of RER (RER), vacuoles (v), autophagosomes (au). <b>(A)</b> Hepatopancreas in animals starved for 21 days. Bar = 2.6 μm. <b>(B)</b> Intestine in animals starved for 21 days. Bar = 1 μm. <b>(C)</b> Hepatopancreas in animals re-fed for 4 days after 14 days of starvation. Bar = 1.5 μm. <b>(D)</b> Intestine in animals re-fed for 4 days after 14 days of starvation. Bar = 0.5 μm. <b>(E)</b> Intestine in animals re-fed for 4 days after 14 days of starvation. Bar = 0.5 μm.