The capitate bone is one of the four bones that comprise the distal row of the carpus or carpal bones that form the wrist. It is the largest of the carpal bones and is placed in the center of the wrist (see image).

Its name originates from the Latin [caput], meaning "head". The capitate bone presents a large, rounded area, called the "head". To complete the homology, the capitate bone also has a narrow segment called the "neck", the rest of the bone called the "body". It is also known as "os capitatum" or "os magnum"

The capitate bone articulates with seven bones, including the scaphoid, lunate, trapezoid, hamate, and the three central metacarpals (2nd, 3rd, and 4th).

The accompanying image shows the anterior (volar) surface of the wrist. Click on the image for a larger picture.

Image modified from the original: "3D Human Anatomy: Regional Edition DVD-ROM." Courtesy of Primal Pictures

The duodenum is a mostly retroperitoneal organ, part of the digestive tract, and the most proximal portion of the small intestine. This organ is approximately 10 inches in length (24.5 cm). It starts at the pylorus of the stomach, has a "C" shape, curving around the head and the neck of the pancreas, to end at the duodenojejunal junction.

The duodenum is described as having four segments of differing length, usually named numerically:

- First segment: about two inches in length, it is dilated and called the "duodenal ampulla", or "superior duodenum"
- Second segment: about three inches in length, it receives bile and pancreatic juice through the hepatopancreatic ducts and ampullae. It is also called the "descending duodenum"
- Third segment: about four inches in length, it crosses the midline, and is also known as the "horizontal" or "transverse duodenum"
- Fourth segment: one inch in length, this is the shortest segment, it ascends towards the duodenojejunal junction, which is tethered to the diaphragm by a fold of peritoneum around a fibromuscular band called the "ligament of Treitz". At this point the retroperitoneal duodenum becomes the intraperitoneal jejunum. This fourth segment is also called the "ascending duodenum"

Sources:
1. "Clinically Oriented Anatomy" Moore, KL. 3r Ed. Williams & Wilkins 1992
2. "The origin of Medical Terms" Skinner, AH, 1970 

This prefix is derived from the Greek and means "slow". Most everybody knows about [bradycardia] meaning "slow heart", but there is a large number of applications of this prefix as follows:

• Bradytrophia: from the Greek [trophe] meaning "to feed" or "nutrition". Braditrophia is a slow nutritional process
• Bradypnea: from the Greek [pnoia], meaning "breath" or "air". Bradypnea is an abnormally slow breathing rhythm
• Bradylalia: from the Greel [lalein] meaning "to talk". Bradylalia is a slow articulation or formation of words, sometimes also known as [bradyarthria] or [bradyphasia]. See the article on aphasia and dysphasia here
• Bradykinesia: from the Greek [kinesis], meaning "movement". Bradykinesia means "slow movement", also known as [bradypragia]
• Bradycrotic: from the Greek [krotos], meaning "pulse" "or pulsation" A bradycrotic agent slows down the patient's pulse or heart rate.
• Bradytocia: from the Greek [tokos], meaning "birth". Bradytocia is a slow birthing process

The word [bregma] is Greek and means "the front of the head". It is actually the point of intersection of the the coronal and sagittal sutures. The coronal suture is the articulation or joint between the frontal and parietal bones, and the sagittal suture is the median joint between both parietal bones. 

The term was first used in anatomy as a craniometric point by Paul Broca (1824 - 1880). The image shows a superior view of two heads and the location of the coronal and sagittal sutures. The bregma is the point of intersection of these two articulations.

Click on the image for a larger view. 

Original image courtesy of Wikipedia

1 = coronal suture 2 = sagittal suture 3 = lambdoid suture. The bregma is the point of intersection of 1 and 2

Marie-Francois Xavier Bichat (1771 - 1802). French physician, surgeon, anatomist and physiologist, Marie-Francois Xavier Bichat was born in the village of Thoirette. His father was a physician, influencing his early instruction and vocation. In Lyon he studied anatomy and surgery. At 28 years of age Bichat was appointed physician to the Hôtel (Hospital) Dieu. His life was influenced by his mentor, Pierre-Joseph Dassault (1738 - 1795). Upon his mentor's death Bichat took upon him to continue and finish his work, while supporting his mentor's family.

Bichat is know for the concept of the body composed of distinct tissues, which he originally called "membranes". Without the aid of the microscope Bichat described 21 different tissues and is considered the founder of the science of histology. His name is preserved in many eponymic structures such as Bichat’s fossa (pterygopalatine fossa), Bichat’s buccal fat pad, Bichat’s foramen (cistern of the vena magna of Galen), Bichat’s ligament (lower fasciculus of the posterior sacroiliac ligament), and Bichat’s tunica intima (tunica intima vasorum). 

Xavier Bichat also contributed to a newer description of the humoral physiological theory, later becoming the basis of hematology. He was also interested in the description of life and death, proposing the existence of an "organic life" and an "animal life". An interesting note is that Bichat died because of an infection he acquired while dissecting a cadaver. Remember that at the time, no embalming was used!

Today Bichat's name is almost forgotten, although in some countries the buccal fat pad is still called "Bichat's fat pad" In many Spanish-speaking countries this structure is referred to as "la bola grasa de Bichat", and many still refer to the removal of this fat pad as "Bichectomy". For an image of the before and after of the procedure, click here.

Sources:
1. "Marie-Fran?ois Xavier Bichat (1771-1802) and his contributions to the foundations of pathological anatomy and modern medicine" Shoja M.M., Tubbs R.S., Loukas M., Shokouhi G., Ardalan M.R.(2008) Annals of Anatomy, 190(5),413-420
2. "Physiological Researches on Life and Death" Bichat, Marie-Francois Xavier, 1827. Translated from French by F. Gold. Richardson and Lord, Boston.
3. "A Historical Perspective: Infection from Cadaveric Dissection from the 18th to the 20th Centuries" Shoja, MM et al. Clin Anat (2013) 26:154-160 

Original image courtesy of
Images from the History of Medicine

This complex medical word is formed by the combination of two root terms: [dacry-] meaning "tear" and [-cyst-], meaning "sac". The combined root [dacryocyst-] means "tear sac" or better, "lacrimal sac" (the Latin word [lacrima] means "tear"). This medical word also has a combined suffix: [-(o)lith], meaning "stone", and [-iasis], meaning "disease or condition".

The word [dacryocystolithiasis] means then, "a condition or pathology of stones (calculi) in the lacrimal sac". The procedure to remove the stones would then be called a [dacryocystolithectomy].