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Effects of Repeated Artificial Insemination on the Structure and Function of Oviducal Sperm Storage Tubules in Hens
artificial insemination chicken fertility decline oviduct sperm storage tubules
2009/7/31
The goal of this study was to determine the mechanism by which the fertility was declined by repeated artificial insemination (AI) in laying hens. The structures of sperm storage tubules (SST) and lym...
Structure and Function of the Root Cap
Exudation Gravitropism Growth direction Mucilage Root apical meristem Root border cells Root elongation rate Root system
2009/7/21
The root cap (RC) is a multilayered dome of spindle-shaped parenchyma cells that overlies the growing root tip. It is present in the roots of almost all crop species. This paper briefly reviews some t...