Reference Terms
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Bronchus
A bronchus (plural bronchi, adjective bronchial) is a caliber of airway in the respiratory tract that conducts air into the lungs. No gas exchange takes place in this part of the lungs. In humans, the trachea (windpipe) divides into two main bronchi (also mainstem bronchi), the left and the right, at the level of the sternal angle. The right main bronchus is wider, shorter, and more vertical than the left main bronchus. The main bronchi subdivide into two and three secondary bronchi that each serve the left and right lungs, respectively. The lobar bronchi divide into tertiary bronchi. Each of the segmental bronchi supplies a bronchopulmonary segment.
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Health & Medicine News
September 29, 2025
Sep. 29, 2025 — Researchers found that middle-aged adults, especially women, are far more likely to be addicted to ultra-processed foods than older generations. Marketing of diet-focused processed foods in the 1980s may have played a major role. Food addiction was ...
Sep. 29, 2025 — Researchers in Sweden and Finland have created the CORE model, a simple blood test that predicts liver disease risk with striking accuracy. Unlike current methods, it works for the general population and can be used in everyday primary care ...
Sep. 29, 2025 — Researchers have revealed how polymyxins, crucial last-resort antibiotics, break down bacterial armor by forcing cells to overproduce and shed it. Astonishingly, the drugs only kill bacteria when they’re active, leaving dormant cells untouched. ...
Sep. 29, 2025 — Scientists discovered that high-fat junk food disrupts memory circuits in the brain almost immediately. Within just four days, neurons in the hippocampus became overactive, impairing memory. Restoring glucose calmed the neurons, showing that ...
Sep. 28, 2025 — Human fertility hinges on a delicate molecular ballet that begins even before birth. UC Davis researchers have uncovered how special protein networks safeguard chromosomes as eggs and sperm form, ...
Sep. 28, 2025 — Inhaled heparin significantly lowers the risk of death and ventilation in COVID-19 patients while also showing potential against other respiratory infections. With its unique triple-action benefits, it could serve as a powerful and accessible ...
Sep. 28, 2025 — Eating more fruit could help protect lungs from air pollution damage, particularly in women. Researchers point to antioxidants and anti-inflammatory compounds in fruit as possible defenses against harmful airborne ...
Sep. 28, 2025 — A groundbreaking international study has shown that a 2-in-1 budesonide-formoterol inhaler is far more effective than the standard salbutamol inhaler in children with mild asthma, cutting attacks by nearly ...
Sep. 28, 2025 — Living with a sense of purpose may not just enrich life, it could also guard against dementia. A UC Davis study tracking over 13,000 adults for up to 15 years found that people with higher purpose were about 28% less likely to develop cognitive ...
Sep. 28, 2025 — Researchers discovered that autism’s prevalence may be linked to human brain evolution. Specific neurons in the outer brain evolved rapidly, and autism-linked genes changed under natural selection. These shifts may have slowed brain development in ...
Sep. 28, 2025 — Beer and wine, staples of human history for millennia, are still yielding new surprises. Recent research highlights how yeast extracts can cloud lagers, gluten can be quickly detected with a simple test strip, tannins give red wine its lip-puckering ...
Sep. 28, 2025 — Researchers in Japan discovered that Parkinson’s patients diagnosed in their 80s are far more likely to show signs of amyloid buildup, a hallmark of Alzheimer’s, even without dementia symptoms. ...
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Sep. 27, 2025 — Daily cocoa extract supplements reduced key inflammation markers in older adults, pointing to a role in protecting the heart. The findings reinforce the value of flavanol-rich, plant-based foods for ...
Sep. 27, 2025 — Ultra-processed foods make up the bulk of U.S. diets, and new research links high intake to inflammation, a predictor of heart disease. People consuming the most UPFs were far more likely to show ...
Sep. 27, 2025 — Researchers are showing how phone sensors can track patterns tied to a wide range of mental health symptoms. Instead of relying only on self-reports, clinicians may soon be able to gather continuous, ...
Sep. 26, 2025 — Scientists have discovered a way to block pain while still allowing the body’s natural healing to take place. Current painkillers like ibuprofen and aspirin often come with harmful side effects ...
Sep. 25, 2025 — Cambridge scientists have created a breakthrough material that can sense tiny chemical changes in the body, such as the increased acidity during an arthritis flare-up, and release drugs exactly when ...
Sep. 25, 2025 — Mangos, often dismissed as too sugary, may hold hidden benefits for those at risk of diabetes. A George Mason University study found that daily mango eaters showed better blood sugar control and less ...
Sep. 25, 2025 — New studies show that a bacterial molecule, peptidoglycan, is present in the brain and fluctuates with sleep patterns. This challenges the idea that sleep is solely brain-driven, instead suggesting ...
Sep. 24, 2025 — For decades, scientists believed Alzheimer’s was driven mainly by sticky protein plaques and tangles in the brain. Now Purdue researchers have revealed a hidden culprit: fat. They found that brain ...
Sep. 24, 2025 — A massive international study has shown that the experimental oral obesity drug orforglipron can help patients shed over 10% of their body weight, with nearly one in five losing 20% or more. Unlike ...
Sep. 24, 2025 — A new wearable device, a-Heal, combines AI, imaging, and bioelectronics to speed up wound recovery. It continuously monitors wounds, diagnoses healing stages, and applies personalized treatments like ...