![]() The function of the duodenum is to mix food with enzymes and bile to digest it. The duodenum is connected to the stomach, allowing food particles to leave the stomach to course through the intestines. The intestinal lumen begins as an interconnected web. (c) A micrograph shows a similarly sized artery and vein. At 8 to 10 inches long, the duodenum is the first and shortest section of the small intestine. Definition: Anatomical space within the intestine where digestion normally occurs. ![]() Learning Objectives Define the two major subtypes of anatomy Key Takeaways Key Points Gross anatomy is subdivided into surface anatomy (the external body), regional anatomy (specific regions of the body), and systemic anatomy (specific organ systems). The atrioventricular (AV) node is a second clump of specialized myocardial conductive cells, located in the inferior portion of the right atrium within the atrioventricular septum. (a) Arteries and (b) veins share the same general features, but the walls of arteries are much thicker because of the higher pressure of the blood that flows through them. Human anatomy is the study of the structure of the human body.
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