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Health is considered to be the state of perfect functioning of body and mind, unhindered by diseases. Disease is the malfunctioning of the organism or part of it due to infection, inherent weakness or environmental stress, that upsets the normal physiological functioning of the ..

These are organs where maturation and proliferation of lymphocytes takes place. Lymphoid organs where T and B lymphocytes mature and acquire their antigen - specific receptors are called Primary Lymphoid organs. Bone marrow (site of B cell maturation) and Thymus gland..

Organ transplantation has become a therapeutic modality to treat patients with end - stage disease. While many types of organs have been successfully transplanted, the histocompatibility barrier between recipient and donor remains a problem. It activates immune responses leading..

fig. 25.8 Worlds first cloned cat called CC (Calico Cat) seen with her surrogate mother Allie Ian Wilmut and co-workers produced in 1997, the worlds first clone of an adult sheep at Edinburgh's Roslin institute. The clone of a sheep was created from a single cell taken from the udder of an adult sh..

In human beings, the respiratory organs are the lun..

Gaseous Exchange in Human Beings - In human beings, the respiratory organs are the lun..

Living organisms are exposed to various external or foreign substances and disease causing organisms like bacteria, viruses and fungi. Such organisms which can cause a disease are known as Pathogens. It is observed that some human beings are more prone ..

Introduction - Health is considered to be the state of perfect functioning of body and mind, unhindered by diseases. Disease is the malfunctioning of the organism or part of it due to infection, inherent weakness or environmental stress, that upsets the normal physiological functioning of..

In humans the respiratory organs are the lung..

Human Digestive System - Man is omnivorous - feeding on different kinds of food. Thus, the structure of the digestive system should be adapted to this diet. The human digestive system consists of an alimentary canal, which is approximately 8metres long. The alimentary canal also..