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North Carolina [US], April 29 : A recent study found that the shape of the human digestive system varies greatly from person to person, with clear differences among healthy individuals. The study may offer insight into how the microbial environment of the gut and medical diagnoses are produced, as well as how the anatomy of the digestive tract influences human health.The study's findings, which were printed in the journal PeerJ.In the words of Amanda Hale, co-first author of the study and doctoral candidate at North Carolina State University, "This area has largely been ignored since there was research more than a century ago that found variability in the relative lengths of human intestines." "When we first started looking into this issue, we were shocked at the magnitude of the variability we discovered.""If you're talking to four different people, odds are good that all of them have different guts, in terms of the relative sizes of the organs that make up that system," says Erin McKenney,corresponding author of the study and an assistant professor of applied ecology at NC State. "For example, the cecum is an organ that's found at the nexus of the large and small intestines. One person may have a cecum that is only a few centimetres long, while another may have a cecum the size of a coin purse. And we found similar variability for many digestive organs."In another striking example, the researchers found that women tend to have longer small intestines than men."Because having a longer small intestine helps you extract nutrients from your diet, this finding supports the canalization hypothesis, which posits that women are better able to survive during periods of stress," says Hale."Given that there is more variation in human gut anatomy than we thought, this could inform our understanding of what is driving a range of health-related issues and how we treat them," says McKenney. "Basically, now that we know this variability exists, it raises a number of research questions that need to be explored."For this study, the researchers measured the digestive organs of 45 people who donated their remains to the Anatomical Gifts Program at the Duke University School of Medicine.In addition to shedding light on the unexpected variability in human anatomy, this project also led to rediscovering the importance of teaching anatomical variation to medical students."It's particularly important in medical training because if students are only learning about a 'normal' or 'average' anatomy, that means they are not going to be familiar with the scope of human variation," says Roxanne Larsen, co-author of the paper and an associate professor of veterinary and biomedical sciences at the University of Minnesota. "It's increasingly clear that the medical field is moving toward individualized medicine to improve patient outcomes and overall health and well-being. Garnering experience in understanding anatomical variation can play a critical role in helping future doctors understand the importance of individualized medicine.""We're excited about this discovery and future directions for the work," McKenney says. "It underscores just how little we know about our own bodies."Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Health :Research: Anatomy of human digestive system varies significantly

North Carolina [US], April 29 : A recent study found that the shape of the human digestive system varies ... ...