Male germ cells (sperm cells) form in the testes at a temperature of about 35 ° C, because they are located in the scrotum (skin-muscle formation), and not in the body cavity, where the temperature is slightly higher. All sperm have a large nucleus surrounded by cytoplasm, neck and tail, with which they can independently move. The composition of the sperm is periodically updated as long as the gonads function.
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.