Some organs of the immune system are called lymphoid organs because they are home to lymphocytes which are the main components of the lymphatic system, The parts of the immune system are scattered throughout...
The life of any living organisms is exposed to continuous threats either from Biological sources (such as pathogens including some insects, animals, protozoa, fungi, bacteria and viruses), Non-biological sources (such as accidents, natural disasters...
The suitable female age for pregnancy ranges between 18 : 35 year, If the age decreases or exceeds that range, both the mother & embryo will be subjected to serious problems and the possibility...
Fertilization is the fusion of the male gamete (sperm) with the female gamete (ovum) to form the zygote which divides to form the embryo, The man may be considered infertile, if the number of...
