In all living organism having the sexual type of reproduction, gametes are necessary. So these gametes are synthesized in the body by a special process. These processes differ from each other in opposite sexes. Different processes synthesize both male and female gametes. Male have germ cells or gametes named as sperms, while the female has gametes named as eggs or ovum. The process of production or development of spermatozoa is called spermatogenesis that occurs in the testicles of the male. On the other hand, spermiogenesis is one of the crucial steps of the process of spermatogenesis. In the process of spermiogenesis, the transformation of spermatids into spermatozoa takes place.
What is Spermatogenesis?
Sperm means male gamete and Genesis means synthesis. Spermatogenesis is the process of formation and development of spermatozoa, in this haploid sperms are formed from diploid sperm. It takes place inside the seminiferous tubules of testes of the male. All stages of spermatogenesis are completed inside the testis of male, and it is a constant process which means that sperms are continuously synthesized in the male. It is a short process in which spermatogonia divides into spermatocytes. This process is carried out in the epithelium of seminiferous tubules. Primary spermatocyte divides into two secondary spermatocytes which further divide by meiosis II to form spermatids. Note that no polar bodies are formed here. These spermatids go through the process of condensation and finally form mature sperms. These sperms have a head, body, and a tail which make it mobile.
What is Spermiogenesis?
Spermiogenesis itself is one of the crucial steps in the process of formation and development of the spermatozoa (Spermatogenesis). In this process, the characteristic of each sperm is formed and is facilitated by the organelles. As we know that sperm formed has a tail, and head that to make an ability, the organelles in this process are organized in such a way that sperm prepares itself to penetrate rightly by avoiding all of the hurdles. Initially in spermiogenesis with the secretion of enzymes from the mitochondria and Golgi bodies, the acrosome is formed. The Golgi complex then covers the condensed genetic material and the acrosome. The next to follow in the process of spermiogenesis is the formation of the tail. One of the centrioles gets extended in a way that it makes up the tails of the sperm. Through the last phase of spermiogenesis, no change in the genetic material takes place; the genetic material becomes condensed and remains protected while the tail formation phase takes place.
Spermatogenesis vs. Spermiogenesis
- Spermatogenesis is the process in which spermatozoa are produced from spermatogonial stem cells by way of mitosis and meiosis, whereas Spermiogenesis is the final stage of spermatogenesis, which sees the maturation of spermatids into mature, motile spermatozoa.
- Spermatogenesis refers to the whole process of sperm production while spermiogenesis is the final and one of the most crucial stages in the formation of sperms.
- In spermatogenesis the genetic material from is converted from diploid to haploid, although this doesn’t happen in the spermiogenesis.
- The enormous increase in a number of cells is witnessed in the process of spermatogenesis, contrary to this, there is no change in the number of cells takes place in spermiogenesis.