The male reproductive cell, the sperm, discards most of the spermatid cytoplasm, the nucleus decreases in size, but invariably retains all chromosomes and DNA. As a result of this transformation, the spermatid becomes a very small, but very mobile cell – the sperm. That is, the cell has discarded all unnecessary to successfully perform its function.
As a result of the growth of the female reproductive cell, it increases in size, mainly due to the accumulation of ribosomes and yolk. This cytoplasm is in the egg with a supply of nutrients, which is necessary for the nutrition of the embryo.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.