Related Experiment Video
Updated: Aug 19, 2026

A 3-D Tail Explant Culture to Study Vertebrate Segmentation in Zebrafish
Published on: June 30, 2021
Formation of detached tail and coiled tail of sperm in a beagle dog
Eiichi Kawakami1, Tomomi Ozawa, Taichi Hirano
1Department of Reproduction, Nippon Veterinary and Animal Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan.
Abstract:
The right testis and epididymis were excised from a Beagle dog that ejaculated high percentages of sperm with detached tails and with coiled tails. Cross sections of the organs were stamped on glass slides and histological examination of the organs was performed to find the portion where sperm with the abnormal tails appear. Many sperm with tails whose axoneme was exposed near the neck region were observed in the testis and they decreased in order from the caput, to the corpus, and the cauda epididymis. Sperm with detached tails and sperm with coiled tails gradually increased in the epididymis. These findings indicate that the tails of sperm with an exposed axoneme detached in the epididymis.
Related Concept Videos
Spermatogenesis
Fixed Action Patterns
Sperm Transport
The maturation phase occurs in the epididymis, where sperm...
Sperm Structure and Semen Composition
Tail-anchoring of Proteins in the ER Membrane

