Ultrastructure of the anal organ of Musca domestica larvae (Insecta, Diptera) in relation to ion transport

摘要: The anal organ of full-grown, third-instar larvae Musca domestica is situated ventrally in the last segment and consists two symmetrical epithelial plates with saddle-shaped features, encircling anus. Structural studies using light electron microscopy have revealed that area epidermal cells overlying cuticle differ markedly from those adjacent normal larval integument. fine structure region chloride epithelium indicates these to be regarded as specialized for transport. Considering results connection histochemical location exclusively this area, it has been suggested involved active transport ions medium haemocoel, ion-absorbing. study are compared what known about comparable structures comparisons discussed detail.