Biomaterial Database

Stages of seminiferous epithelial cycle and relative duration of spermatogenic processes in the buffalo (Bos bubalus). 1976

S S Guraya, and G S Bilaspuri

By using haematoxylin-eosin preparations, the seminiferous epithelial cycle (SEC) in the buffalo has been divided into 8 stages; stages 1, 2, 3, 4 and 8 have been subdivided. The percentage frequency of these stages and substages has been determined by using the serial sections. The approximate relative duration for the various spermatogenic cells and processes has been worked out from the percentage frequency of a substage or a stage, and the number of substages or stages in which the particular cell or the cell phase was present. The total approximate duration of spermatogenesis in the buffalo is 457 units, which has been divided by the duration of one SEC (i.e. 100 units). The buffalo spermatogenesis is constituted by 4.57 cycles of seminiferous epithelium. The results of the present studies have been compared and contrasted with those of previous studies on various mammalian species including farm animals. For its kinetics of spermatogenesis, the buffalo resembles the bull closely.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D002020	Buffaloes	Ruminants of the family Bovidae consisting of Bubalus arnee and Syncerus caffer. This concept is differentiated from BISON, which refers to Bison bison and Bison bonasus.	Bubalus,Syncerus,Water Buffaloes,Buffalo,Water Buffalo,Buffalo, Water
D002467	Cell Nucleus	Within a eukaryotic cell, a membrane-limited body which contains chromosomes and one or more nucleoli (CELL NUCLEOLUS). The nuclear membrane consists of a double unit-type membrane which is perforated by a number of pores; the outermost membrane is continuous with the ENDOPLASMIC RETICULUM. A cell may contain more than one nucleus. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)	Cell Nuclei,Nuclei, Cell,Nucleus, Cell
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012670	Seminiferous Epithelium	The epithelium lining the seminiferous tubules composed of primary male germ cells (SPERMATOGONIA) and supporting SERTOLI CELLS. As SPERMATOGENESIS proceeds, the developing germ cells migrate toward the lumen. The adluminal compartment, the inner two thirds of the tubules, contains SPERMATOCYTES and the more advanced germ cells.	Epithelium, Seminiferous,Epitheliums, Seminiferous,Seminiferous Epitheliums
D013087	Spermatids	Male germ cells derived from the haploid secondary SPERMATOCYTES. Without further division, spermatids undergo structural changes and give rise to SPERMATOZOA.	Spermatoblasts,Spermatid,Spermatoblast
D013091	Spermatogenesis	The process of germ cell development in the male from the primordial germ cells, through SPERMATOGONIA; SPERMATOCYTES; SPERMATIDS; to the mature haploid SPERMATOZOA.	Spermatocytogenesis,Spermiogenesis
D013737	Testis	The male gonad containing two functional parts: the SEMINIFEROUS TUBULES for the production and transport of male germ cells (SPERMATOGENESIS) and the interstitial compartment containing LEYDIG CELLS that produce ANDROGENS.	Testicles,Testes,Testicle
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor