The cation channel of sperm (CatSper) is essential for sperm motility and fertility1,2. CatSper comprises the pore-forming proteins CATSPER1–4 and multiple auxiliary subunits, including CATSPERβ, γ, δ, ε, ζ, and EFCAB91,3–9. Here we report the cry
The possible relations between the structures observed and the motility of the spermatozoa are discussed; in addition, some phylogenetic comments are attempted. 展开 关键词: aflagellate spermatozoon Platyhelminthes Pseudostomum sperm ultrastructure sperm motility comparative morphology ...
The axoneme exhibits a 9+9+2 pattern with accessory tubules formed by 16 protofilaments and intertubular material. However, spermatozoa of A. formicaria show some remarkable features. The sperm cell is short for an insect, being only 50m in length. The nucleus is characterized by the ...
ascus- saclike structure in which ascospores are formed through sexual reproduction of ascomycetes sporophore- a spore-bearing branch or organ: the part of the thallus of a sporophyte that develops spores; in ferns and mosses and liverworts is practically equivalent to the sporophyte ...
Sperm structure and ultrastructure of Melit- tobia hawaiiensis Perkins and M. australica, Girault (Chalcidoidea: Eulophidae). Tissue Cell 41, 113-117.Brito, P; Lino-Neto, J & Dolder, H (2009) Sperm structure and ultrastructure of the Melittobia hawaiiensis, Perkins and M. australica, ...
1.A central or essential part around which other parts are gathered or grouped; a core:the nucleus of a city. 2.Something regarded as a basis for future development and growth; a kernel:a few paintings that formed the nucleus of a great art collection. ...
are then sent to the fallopian tube, where they can be fertilized by sperm. The fertilized egg is thereafter transported to the uterus, where the uterine lining has broadened as a result of the typical hormones of the reproductive cycle. An ovary is found on each side of a female's body...
The spermatozoon of the African catfish: fine structure, motility, viability and its behaviour in seminal vesicle secretion The spermatozoon of the African catfish Clarias gariepinus is a simple organized aquasperm although it reveals very unique characteristics: the cytoplasmic... N Mansour,F Lahnst...
生物专业英语Lecture 2-Cell structure.pdf,Inside the Living Cell: Structure and Function of Internal Cell Parts The cell is the basic, living, structural and functional unit of the body. Cytoplasm 细胞质 The Dynamic, Mobile Factory • Cytosol (细胞溶质
The ODA has a single large dynein motor that repeats every 24 nm and influences the frequency of ciliary waveforms9,10. In contrast, the IDA regulates the amplitude of ciliary waveforms and is formed by seven smaller dyneins (IDAa-g) that each repeat every 96 nm12. Genetic studies in ...