Histologische Untersuchungen �ber den Feinbau des Oogenotop bei digenen Trematoden

Structure and function of the female reproductive ducts of the fish blood-flukeAporocotyle simplexOdhner, 1900 (Digenea: Sanguinicolidae)

“…After the relaxation of the musculature in the distal part of the ovi-vitelloduct a wave of contractions forces this row of cells throughout the ovi-vitelloduct and into the ootype in which the next main process of the egg development, the formation of an egg capsule, will start. EBRAHIMZADEH (1966) pointed out that morphological and histochemical light-microscope studies have shown most digeneans to have two types of secretory cells in the Mehlis' gland complex. The distribution of these so-called 'serous' and 'mucous' cells in relation to each other, however, varies from species to species.…”

Fine Structure of the Reproductive System of a Frog Lung Fluke. I. Mehlis' Gland and Associated Ducts

“…It was noted that cytoplasmic processes of these cells open into the ootype region. According to Ebrahimzadeh (1966), the "serosen" cells probably secrete a substance that is involved in the confluence of shell granules produced by vitelline cells, while the secretion of "mukosen" cells may be involved in the formation of a basic shell membrane. Chemical analyses of extracts of Mehlis' gland in F. hepatica indicate that considerable lipoprotein and some phospholipid are present, and microscopic studies showed that lipoprotein granules pass from the gland cells into the ootype (Clegg, 1965).…”

“…More recently, shell formation and the Mehlis' gland complex in trematodes have been studied by Clegg (1965), Coil (1965Coil ( , 1966, and Ebrahimzadeh (1966). An excellent review of the literature and theories of Mehlis' gland function is to be found in Ebrahimzadeh's (1966) work, which deals with the comparative histology of this complex glandular region and its associated ducts.…”