The two parts of which each gland is composed, are known as the cortex or outer portion (literally the bark) and the medulla or inner portion (literally the core).

The medulla-to-be consists of cells accompanying the vegetative nerves.

In degeneration of the interior of the gland, which destroys the medulla, but not the cortex, the color of the skin is left unmodified.

Upon the medulla, the interior gland of the gland, there has been lavished an amount of attention beside which the cortex is to be classed as a neglected wall-flower.

In the first place, the medulla contains numerous nerve cells, belonging to the vegetative, also called the sympathetic nervous system.

The characteristic staining power appears to be dependent upon, or correlated with, the presence of the internal secretion of the medulla of the adrenal, adrenalin.

Chemical tests demonstrated that it originated in the medulla.

The exact amount of it present in the medulla, in the blood issuing from the adrenals and in the circulation in general have been determined.

A nerve tract, in use as the line for that particular message in a hundred thousand generations of cats, whirrs its yell to the medulla of the adrenal gland.

If, it would seem, the cortex secretion now pours into the blood, enough to more than overcome the effects of the medulla secretion, the inter-muscular equilibrium is disturbed in the opposite direction, for fight rather than flight, and anger results.

Habitually fleeing and fearful animals, like the rabbit, have a small cortex and a wide medulla in their adrenals.

The adrenal medulla reinforced by the thyroid makes for terror, the adrenal cortex reinforced by the thyroid makes for fury.

It depends upon the proportion of adrenal cortex to medulla secretion in them.

But even in the least fearsome, i.e., an individual in whom cortex dominates medulla, there may be fearcomplexes, dating back to events and times when medulla overtopped cortex, especially childhood.

But even in the least fearsome, i.e., an individual in whom cortex dominates medulla, there may be fearcomplexes, dating back to events and times when medulla overtopped cortex, especially childhood.

So in the coolest people, certain persons, objects, episodes, may send a wave along an old line of nerve cells and paths which lead to the adrenal medulla, and so flood him with fear, terror or even panic before his usual cortex response occurs.

In women, the adrenal medulla naturally tends to overtop the cortex, because the latter makes for masculinity.

Besides, the recurring cycle in the ovary, making the corpus luteum, evolves an additional stimulant to the medulla, through its irritating influence upon the thyroid.

It would follow that courage meant simply inhibition of the adrenal medulla.

The thyroid and the adrenal medulla also exert their influence.

In the large, the curve of his life is the curve of secretion by this gland, both of its Cortex and medulla.

In the anterior part of the medulla, pass the nerves for motor transmission, that is, nerve influences from above downwards that shall result in muscular contractions in some part of the body.

Passing from the medulla they descend near the oesophagus to the stomach, sending off, on their way, branches to the throat, the larynx, the lungs, and the heart.

Medulla Oblongata.

A part of the medulla oblongata, the destruction of which causes instant death.