A critical arterial circle at the base of the brain. The circle of Willis receives all the blood that is pumped up the two internal carotid arteries that come up the front of the neck. All the principal arteries that supply the two halves of the brain (hemispheres) branch off from the circle of Willis.
- Wilms tumor
A childhood form of kidney cancer with a peak age of occurrence at 3 years of age. It is sometimes associated with abnormalities of the urinary tracts or other birth defects. Some cases are related to defects in one of two genes referred to as Wilms’ tumor 1 (WT1) or Wilms’ tumor 2 (WT2). Symptoms […]
- Wilson disease
An inherited disorder of copper metabolism that results in an abnormal accumulation of copper in the body. Although the accumulation of copper begins at birth, symptoms of the disorder do not appear until later in life, between the ages of 6 and 40. A diagnostic feature of the disease is a Kayser-Fleischer ring, a deep […]
Women. A late 20th century creation. A feminist spelling to avoid the suffix men.
The trachea, a tube-like portion of the respiratory (breathing) tract that connects the larynx (the voice box) with the lungs. Each time we inhale (breathe in), air goes into our nose or mouth, then through the larynx, down the trachea, and into our lungs. When we exhale (breathe out), the air goes out the other […]
- Wing bone
Popular and familiar term for the scapula, the flat triangular bone at the back of the shoulder. The word “scapula” (with the accent on the first syllable) is a steal straight from the Latin. The Romans always employed the plural “scapulae”, the shoulder blades. Because the shoulder blade resembles the blade of a trowel (a […]