An osmoregulatory syncytium and associated cells in a freshwater mosquito.
Autor(es): Edwards, H. A.; Harrison, J. B.
Resumo: In embryological terms the anal papillae are the product of eversion of the hindgut tissue. The hindgut consists of four distinct regions: the ileum and part of the anal canal have a mechanical function, the rectum and the posterior and canal contain transporting cells. Two new cell types, "interstitial" and "tertiary" are reported in the rectum. The structure of the anal papillae changes with increased salinity. Changes in the plasma membranes alter the surface area for transport. Changes in the number of mitochondria are not accompanied by changes in oxygen consumption. In Aedes aegypti the papillary epithelium appears to be a syncytium. Across the lumen of the papillae there are cellular sheets supporting the tracheoles. At the base of the papillae there is a cellular transition zone: circular muscles in this region may be used to occlude the papilae. The control of salt transport may be hormonal.
Palavras-Chave: Cells, Osmoregulation; Animal morphology; Morphology; Plasma membranes; Rectum; Syncytia
Imprenta: Tissue and Cell, v. 15, n. 2, p. 271-280, 1983.
Descritores: Aedes aegypti - Cell
Data de publicação: 1983
