Department of Anatomy and Histology, Faculty of Veterinary Sciences, University of Khartoum, Sudan.W
The mammalian tubuli recti: Ultrastructural study
Article first published online: 8 FEB 2005
Copyright © 1978 Wiley-Liss, Inc.
The Anatomical Record
Volume 192, Issue 1, pages 1–17, September 1978
How to Cite
Osman, D. I. and Plöen, L. (1978), The mammalian tubuli recti: Ultrastructural study. Anat. Rec., 192: 1–17. doi: 10.1002/ar.1091920102
- Issue published online: 8 FEB 2005
- Article first published online: 8 FEB 2005
- Manuscript Accepted: 29 MAR 1978
- Manuscript Received: 29 NOV 1977
The ultrastructure of the tubuli recti was studied in the testes of sexually mature bulls, boars, rams, goats, rabbits and rats fixed by vascular perfusion. The tubuli recti are lined with a simple epithelium that varies in height, from squamous to tall columnar according to the species and the region. The cells are characterized by extensive lateral and tortuous basal plasma membranes and a luminal border with microvilli. Tight junctions and desmosomes are found in the upper half of the lateral borders. The Golgi apparatus is sizable and associated with it are coated vesicles and may smooth vesicles concentrated towards the luminal border. A distal segment of the tubuli recti is found in bulls only and is characterized by a high epithelium which is thrown into folds giving the lumen a festooned appearance. It is suggested that the epithelial cells of the tubuli recti are involved in fluid exchange and in the removal of unwanted spermatozoa.