Category: A

The constricted segment of the humerus between the head and the greater tubercle.  

The horn-shaped portion of the gray matter of the ventral part of the spinal cord.  

Any of several hormones (e.g., epinephrine and norepinephrin) produced by the adrenal medulla.  

A hormone (e.g., aldosterone or cortisol) that is secreted by the cortex of the adrenal gland.  

A dislocation of the hip through the obturator foramen, on the pubis, in the perineum, or through a fractured acetabulum.  

A small conical elevation on the cell body of a neuron from which the axon arises.  

A state of hibernation produced therapeutically by use of drugs alone or drugs and hypothermia. This greatly reduces the metabolic rate during procedures such as open heart surgery.  

A hernia that develops any time after birth in contrast to one that is present at birth (congenital hernia).  

An incision into the liver.  

Persistent hepatic inflammation and necrosis, in the setting of hypergammaglobulinemia and autoantibodies, and in the absence of other common causes of liver injury.