development of the foetus

Progesterone is secreted by the corpus luteum which is a yellowish body formed in the empty graafian follicle after the release of the ovum. Ovulation, formation of corpus luteum and secretion of progesterone are stimulated by the luteinising hormone from the anterior pitutary. The main functions ..

The hormone progesterone is continually required during the entire period of pregnancy. Hence this hormone is aptly referred to as pregnancy hormone. Pregnancy can be classified into 2 main stages: a) Crucial first 3 months (trimester) b) Post trimester During the first three months of pregnancy, t..

The female reproductive system consists of a pair of ovaries, a pair of oviducts, uterus, vagina and vulva. The main functions of the female reproductive system are to produce eggs, receive the sperms, provide the site for fertilisation, implantation of the growing embryo and development..

Female Reproductive System - The female reproductive system consists of a pair of ovaries, a pair of oviducts, uterus, vagina and vulva. The main functions of the female reproductive system are to produce eggs, receive the sperms, provide the site for fertilisation, implantation of the growing embr..

Foetus in Different Positions and Stages The placenta in turn is embedded into the uterine wall and is richly supplied with blood vessels. The nutrients from the mother's blood pass into the umbilical cord and the waste from the foetus pass into the mother's blood through the pl..

It develops above the embryo. It consists of the trophoblast inside and mesoderm outside. Between the amnion and the embryo, there is the amniotic cavity filled with the amniotic fluid secreted by the embryo and the amnion. The amnion and the fluid filled amniotic cavity enlarge and nearl..

Lymphocytes are the main cells of the immune system. They arise from stem cells present in the liver in the foetus and in the bone marrow in the adult. Comparison of cell-mediated and humoral immunity Some of them continue their maturation in the bone marrow and develop into b -..

a mating organ, penis. Internally, the testis consists of a network of seminiferous tubules and the interstitial cells between the tubules. The seminiferous tubules produce sperms that are passed along the tubules to the posterior region of the testis. The interstitial cells are also called ..

Increased incidence of tumours, ulcers due to nitrate pollution. Increased incidence of skin disorders due to contact with pollutants. Increased incidence of constipation, diarrhea and infections to intestine. Dangerous effects on growing foetus in pregnant women. Concentrat..