human fertilisation and embryology

Fertilisation - Fertilisation can be defined as the fusion of the sperm nucleus with the egg nucleus to form a diploid cell known as zygote. The fertilisation is internal in the human reproductive system. It is achieved by the insertion of the male organ, pen..

Fertilisation - Fertilisation can be defined as the fusion of the sperm nucleus with the egg nucleus to form a diploid cell known as zygote. The fertilisation is internal in the human reproductive system. It is achieved by the insertion of the male organ, pen..

Embryology is another branch, which offers some indirect evidences for evolution. An embryologist by name Haeckel, proposed the idea 'ontogeny recapitulates phylogeny' which means that the evolutionary history (phylogeny) of a species is indicated by the developmental stages (ontogeny) t..

The human female reproductive system performs the following functions: a) Formation of eggs b) Reception of sperms during copulation c) Providing a conducive environment for fertilisation d) Providing shelter and nourishment to the growing embryo. The female reproductive system ..

Cleavage is an unique embryological process which transforms the single fertilised egg cell into a sphere of closely aggregated multitude of cells. Immediately after fertilisation the fertilised ovum (egg cell) undergoes a series of cell divisions. These divi..

All the events which change a zygote into a fully developed organism is called embryonic development. The entire process of development is called embryogenesis. Von Bear is called the "Father of Modern Embryology". Embryonic Development includes a definite series of fundamentally similar ..

In multicellular organisms, the male gametes called the are produced by the male reproductive part and the female gametes called the eggs are produced by the female reproductive part. The male gamete of one individual fertilizes the female gamete of another individual to produce the zygote. Th..

The ovum is the female haploid gamete which fuses with the sperm and develop into an organism after fertilisation..

Animals may reproduce by asexual and sexual modes. The reproductive system of sexually reproducing animals consists of primary sex organs which produce the gametes, the secondary sex organs which participate in reproduction but do not form gametes and accessory sex characters which distinguish the ..

Parthenogenesis is a form of reproduction in which the ovum develops into a new individual without fertilisation. Natural parthenogenesis has been observed in many lower animals (it is characteristic of the rotifers), especially insects, e.g., the aphid. In many social insects, such as th..