Spermatozoa "swim" via the rotational movement or flagellating of a tail, and move through chemotaxis into contact with the oocyte where one spermatozoan fertilizes the egg, thereby creating a zygote. These are produced in the testes , which are housed in the temperature-regulating scrotum ; immature sperm then travel to the epididymis for development and storage. These alleles may be the same on each pair of chromosomes, or different, for example, blue eyes or brown eyes. As gametes are formed, the 46 chromosomes from each parent cell 23 pairs of chromosomes are divided through meiosis so that each gamete is haploid, having only 23 unpaired chromosomes. The human female reproductive system contains three main parts: Human male reproductive system Male reproductive system The male reproductive system is a series of organs located outside the body and around the pelvis region of a male that contribute towards the reproduction process. Rod shaped bodies found in the nucleus of cells that contain genetic information DNA.. When an egg cell and sperm cell join together, the fertilised egg cell contains 23 pairs of chromosomes.
The reason for this is that, in each somatic cell of a normal female, one of the X chromosomes is randomly deactivated. Endocrine hormones are a well-known and critical controlling factor in the normal differentiation of the reproductive system. Human female reproductive system Female reproductive system The human female reproductive system is a series of organs primarily located inside the body and around the pelvic region of a female that contribute towards the reproductive process. Each oocyte is protected by several layers of granulosa cells called the corona radiata. The vagina is attached to the uterus through the cervix , while the uterus is attached to the ovaries via the Fallopian tubes. Spermatozoa "swim" via the rotational movement or flagellating of a tail, and move through chemotaxis into contact with the oocyte where one spermatozoan fertilizes the egg, thereby creating a zygote. Sex cells only contain one chromosome from each pair. During meiosis the male XY sex-chromosome pair separates and passes on an X or a Y to separate gametes; the result is that one-half of the gametes sperm that are formed contains the X chromosome and the other half contains the Y chromosome. Parents pass on their genesgenes: This means different children in the same family will each get a different combination. Development of the reproductive system The development of the reproductive system and the development of the urinary system are closely tied in with the development of the human fetus. This deactivated X chromosome can be seen as a small, dark-staining structure—the Barr body —in the cell nucleus. Next Sex cells and chromosomes Human body cells each contain 23 pairs of chromosomeschromosomes: Each ovary contains hundreds of egg cells or ova singular ovum. The primary direct function of the male reproductive system is to provide the male sperm for fertilization of the ovum. This is why children in the same family look a little like each other and a little like each parent, but are not identical to them. The eggs fertilized by X-bearing sperm become females XX , whereas those fertilized by Y-bearing sperm become males XY. Facts about Gametes - Spermatozoa are about 55 micron long: One chromosome in each pair comes from the mother, the other from the father. The breasts are involved during the parenting stage of reproduction, but in most classifications they are not considered to be part of the female reproductive system. However, there are different versions of a gene called alleles. Hormones produced by the ovaries prepare the uterus to receive the ovum. This is because the male who inherits the recessive allele on his X chromosome has no allele on his Y chromosome to counteract its effects. Female genitalia The vagina meets the outside at the vulva , which also includes the labia , clitoris and urethra ; during intercourse this area is lubricated by mucus secreted by the Bartholin's glands. The final category are those used for copulation and deposition of the sperm within the female; these include the penis , urethra , and vas deferens. Therefore, each sperm or egg that the body produces is unique -- it contains a different mix of the mother's and father's genes. These are produced in the testes , which are housed in the temperature-regulating scrotum ; immature sperm then travel to the epididymis for development and storage.
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THE MALE REPRODUCTIVE SYSTEM OF HUMAN
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