thymus

Primary lymphoid organs

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Primary lymphoid organs

Introduction to Lymphoid Organs Lymphocytes, which are immature and generated in hematopoiesis gets mature and become committed to a particular antigenic specificity within the primary lymphoid organs. The cell becomes immune-competent only after the lymphocytes have matured in the primary lymphoid organs. T cells arise in the bone marrow and develop in the thymus. In … Read more

Major endocrine glands, their hormones and functions

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Introduction The glands which do not have any duct are called ductless glands or endocrine glands. Literally, the term ‘endocrine’ means internally secreting. Their secretions are called internal secretions or hormones. These are released directly into the blood, which carries them to different parts of the body, and where they coordinate their metabolic activities. They … Read more