Chronological and structural disorder of the spindle-shaped body during human spermatid differentiation
| Autor: | Haide Breucker, E Schäfer, A F Holstein, C Schirren |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Axoneme
Adult Male endocrine system Histology Spermiogenesis Biopsy Spindle Apparatus Biology Fibrous sheath Testis medicine Humans Infertility Male Annulus (mycology) Rib cage Spermatid urogenital system Spermatid differentiation Anatomy Middle Aged Spermatids Spermatozoa medicine.anatomical_structure Sperm Tail Ultrastructure |
| Zdroj: | Acta anatomica. 137(1) |
| ISSN: | 0001-5180 |
| Popis: | In a testicular biopsy of an infertile man most of the spermatids revealed a lack of the middle piece because of a malformed or untimely occurring spindle-shaped body. When during spermatid differentiation the spindle-shaped body appeared it contained the typical bundles of tubules but was often reduced in size and arranged only unilaterally to the axoneme. After the disappearance of the incomplete spindle-shaped body, the annulus did not descend, the ribs of the fibrous sheath of the principal piece were found far proximally and the mitochondrial sheath of the middle piece could not be formed. In consequence of this faulty development, the spermatozoa were immotile. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|