thymus and pancreas

Thymus - It is a gland that is prominent behind the breastbone in children. It gradually decreases in size in adults. It secretes hormone called thymosin. Thymosin helps in the production of lymphocyte..

It is a gland that is prominent behind the breastbone in children. It secretes hormone called thymosin. Thymosin helps in the production of lymphocyte..

The 3 germ layers give rise to definite organs and organ systems. The different organs formed from the different layers are Germ Layer - Structures formed Ectoderm - Epidermis, lens retina, internal ear, CNS, middle and posterior pituitary and pineal gland Mesoderm - Muscles, connective tissue, der..

>When the body instantly responds to an external stimulus, it is called reflex action. Reflex may be natural or conditioned. Natural reflex does not involve the brain whereas conditioned reflex involves the brain. The path along which the impulses travel in a reflex are called the reflex arc. Chemi..

Endocrine system of human (a)female and (b) male The endocrine glands are of two types: purely endocrine and partly endocrine. i) Purely endocrine glands are devoted entirely to the secretion of hormones. They include the hypothalamus, thyroid, parathyroids, thymus, adrenals or suprarenal..

. The secretions of the endocrine glands are called hormones . Hormones have the following characteristics: they may be proteinaceous or non-proteinaceous (amino acids or steroids) they are secreted as per need and not stored, only excreted their secretion may be regulated by nerves or by feedback ..

>A bunch of neurons together make up a nerve. Based on the types of neurons present, the nerve is called sensory, motor and mixed. The messages are transmitted along the nerves in the form of electrical impulses. These are maintained by the changing concentrations of potassium and sodium ions acros..