Human Reproductive System

These glands stimulate contraction in the female reproductive tract.

It is the lyctic enzyme released by a sperm.

It is the process of fertilisation.

It is the merging of the nuclei of the sperm and egg cells resulting in fertilisation.

It is the test used to detect the sex of the foetus.

A Testis is one of a pair of organs and part of the male reproductive system. They are the site of sperm production and are also the major producer of the male hormone Testosterone. These are male gonads.

After a female egg is fertilized, it becomes known as a zygote. Once the egg is fertilized, the zygote begins a two-week period of rapid cell division and will eventually become an embryo. The zygote divides through a process known as mitosis, in which each cell doubles by dividing into two cells.

The scrotum is a sac that hangs under the penis and holds the testes in males. It is divided internally into two halves by a membrane each half containing a testis.

The two labia minora meet at the clitoris, a small, sensitive protrusion in females that is comparable to the penis in males. The clitoris is covered by a fold of skin, called the prepuce, which is similar to the foreskin at the end of the penis. Like the penis, the clitoris is very sensitive to stimulation and can become erect.

Spermatogenesis is the process by which male primary germ cells undergo division, and produce a number of cells termed spermatogonia, from which the primary spermatocytes are derived. Each primary spermatocyte divides into two secondary spermatocytes, and each secondary spermatocyte into two spermatids or young spermatozoa.

A thick white opaque fluid that is secreted by seminal vesicals, glands that open into the urethra is called semen.. The function of semen is to protect the sperm cells in the vagina, provide energy for weakened sperm cells, and help contract the uterine muscle to move the sperm cells into the uterus faster.

A small walnut-shaped wrinkled bag of skin holds the testicles and is called the scrotum. Muscle fibers in the scrotum contract to help hold the sperm producing testicles closer to the body when warmth is needed and relax to allow the testicles to move farther away when it is too warm.

Vasectomy is a surgical sterilization procedure performed on males, involving the cutting or sealing of the vas deferens to prevent sperm from mixing with semen during ejaculation. It is a permanent birth control method for men. Tubal ligation is the equivalent female sterilization procedure, performed on the fallopian tubes.

Conversion of spermatid into spermatozoa is called spermiogenesis. 

Golgi body of the spermatid forms the acrosome of the sperm during spermiogenesis.