large intestine
Noun: 1. The final section of the digestive system: The large intestine is the part of the gastrointestinal tract that follows the small intestine. Its primary functions are to absorb water and electrolytes from the remaining indigestible food matter and to compact the waste into feces for excretion. 2. Anatomical structure: It is anatomically defined as beginning at the cecum (where it connects to the small intestine) and ending at the rectum. Its major components include the cecum, colon, and rectum.
The term "large intestine" is used to refer to this specific organ system in anatomical, medical, and biological contexts. * It is typically used with the definite article "the" (e.g., the large intestine). * It functions as a countable noun.
- Medical Context: "The doctor explained that the inflammation was located in the large intestine."
- Biological Function: "Water absorption is a key role of the large intestine."
- Anatomical Description: "The large intestine is wider but shorter than the small intestine."
- "large intestine" vs. "colon": While often used interchangeably in casual conversation, the colon is technically a subsection of the large intestine. The large intestine comprises the cecum, colon, and rectum.
- In medical terminology, conditions are often specified more precisely (e.g., colitis, inflammation of the colon; rather than saying inflammation of the large intestine).
- Colon (n): The longest part of the large intestine, primarily responsible for water and salt absorption. Example: "A colonoscopy examines the health of the colon."
- Cecum (n): The pouch-like beginning of the large intestine. Example: "The appendix is attached to the cecum."
- Rectum (n): The final straight portion of the large intestine, terminating at the anus. Example: "The rectum stores feces before they are expelled."
- Bowel (n): A more general term often referring to the intestines, including both the small and large intestine. Example: "Bowel movements are influenced by large intestine health."
- Lower intestine: A less common but sometimes used synonym, emphasizing its position relative to the small intestine.
- Large bowel: A common synonym in medical and lay contexts.
- Small intestine: The long, coiled section of the digestive tract preceding the large intestine, where most digestion and nutrient absorption occurs.
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beginning with the cecum and ending with the rectum; includes the cecum and the colon and the rectum; extracts moisture from food residues which are later excreted as feces
