Segmentation contractions
Segmentation Contractions
Segmentation contractions (pronunciation: /sɛɡˌmɛnˈteɪʃən kənˈtrækʃənz/) are a type of muscular contraction that occur in the digestive tract, specifically in the small intestine and large intestine. These contractions are responsible for mixing and moving the contents of the intestines, aiding in the process of digestion and absorption of nutrients.
Etymology
The term "segmentation contractions" is derived from the word 'segment', which refers to a part or section of something, and 'contraction', which refers to the process of becoming smaller or pressed together. In the context of the digestive system, it refers to the contractions that occur in segments along the intestines.
Function
Segmentation contractions play a crucial role in the digestive process. They help to mix the chyme (partially digested food) with digestive enzymes and bring it into contact with the walls of the intestines for absorption. These contractions also help to move the chyme along the intestines at a slow pace, allowing ample time for absorption of nutrients.
Related Terms
- Peristalsis: This is another type of muscular contraction in the digestive tract that propels food along the tract. Unlike segmentation contractions, peristalsis involves wave-like contractions that move in one direction.
- Chyme: This is the semi-fluid mass of partially digested food that is formed in the stomach and intestine during digestion.
- Digestive enzymes: These are substances produced by the body to help break down food into nutrients that can be absorbed.
- Absorption: This is the process by which nutrients from food are taken into the body's cells.
External links
- Medical encyclopedia article on Segmentation contractions
- Wikipedia's article - Segmentation contractions
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