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Male Reproductive system

 Reproductive system  Sexually reproducing animals possess a functional reproductive system . Animals which are having both male and female reproductive structures for e.g. in liver fluke, tape worm and earth worm are called monoecious animals on the other hand animals which are having separate reproductive structures in both male and female is known as dioecious animals . Humans are dioecious animals i.e both sexes are separate. The reproductive system of human consists of  1. Primary sex organs 2. Secondary sex organs  3. Accessory sex organs  The primary sex organ produses gametes  , testis in males and ovary in females . It also secretes sex hermones . Secondary sex organs consists of  prostate, seminal vesicle, vas defferens and penis in male . The female Secondary sex organs  consists of fallopian tube, uterus, vagina and mammary gland. These are have important functions in reproduction.  Accessory sex organs distinguish between m...
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Cleavage in human

Cleavage in human embryo: After the fertilization process is done the resulting zygote undergoes rapid and  repeated mitotic division which result in the formation of bunch of small cells . This process in known as cleavage .  Cleavage is different from normal cell division in which the cells become smaller and smaller but the total volume of the embryo remains constant.  Cleavage of the zygote occurs in the fallopian tube of the uterus.  It takes 30 hours to complete the first cleavage which divides  the single celled zygote longitudinally in to two blastomeres of un equal size and then followed by another division after 10 hour from the 1st cleavage in right angle to the plane of 1st cleavage resulting in to four blastomeres . During early cleavage the embryo slowly moves towards uterus.  Morula stage-   In fourth day the embryo reaches the uterus during this the embryo reches 16- 32 called stage called morula ,  This is the solid mass of cell ...
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Female Reproductive system

 The female reproductive organs contains a pair of ovaries ,paired oviducts ( fallopian tubes ), single uterus and external organs collectively called vulva . Ovaries are the primary sex organs and others are female accessory ducts .  The ovaries secretes female sex hermones and also  produce female gametes ova , the ova transport in to the fallopian tube for fertilization by sperm , implantation and development of fetus occurs in uterus , the vagina receives penis during sexual intercourse , act as a passage for menstrual flow and also the passage for child birth . Ovaries   These are a pair of primary female reproductive organs.  The ovaries are located in a shallow depression in each side of uterus called ovarian fossae and  held in position within peritoneal cavity by several ligaments anchors ovary medially to the uterus .  The ovary have three parts: germinal epithelium, tunica albuginea, and ovarian stroma. The germinal epithe...
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