The sperm is the male gamete in case of human reproduction.
Approximately 200-300 million sperm are ejaculated at one go.
Structure of sperm:
The sperm consists of the head, neck, middle piece and tail.
The entire body of the sperm is covered by a plasma membrane.
The head consists of a cap-like structure called the acrosome which contains digestive enzymes that help in the fertilization of the ovum. It also contains a haploid nucleus i.e. with only 23 chromosomes.
The middle piece consists of many mitochondria which provide energy to the sperm for locomotion, it also contains the centrioles.