INTRODUCTION
Endocrinology is one of the most fascinating disciplines
of modern biology. It is the study of glands and the hormones
they produce. The secretions of these glands are
produced internally, hence the name endocrine in
comparison to secretions of other (exocrine) glands which
are secreted externally or in the lumen. The most exciting
aspect of endocrinology is its very minute secretions (hormones)
initiating a cascading effect on the target organs
and human metabolism affecting body systems, organs
and tissues locally as well as at varying distances from
the site of secretion. The hormones have local effects on
the cells which synthesize them (autocrine) as well as on
the immediate surroundings and adjacent cells (paracrine).
- معلم: جاسم عبد العباس عبد الله