This means their health risks start to rise at a lower BMI, because intra-abdominal fat is directly linked to development of heart disease and type 2 diabetes. People with this pattern of weight gain are described as ‘apples’ rather than ‘pears’ from their body outline. People of Asian origin are prone to accumulating intra-abdominal fat (fat deep inside your stomach cavity rather than under your skin) at a lower BMI than people of Caucasian origin. However, this only applies to people who do high levels of exercise – much more than average. If you are very muscular, your level of body fat may be lower than predicted by your BMI. Intra-abdominal fat is much more closely linked to risks of type 2 diabetes and heart disease than fat under the skin. If you are very muscularīMI assumes you have an average amount of body fat, including ‘intra-abdominal fat’ – fat deep inside your stomach cavity rather than under your skin. Usual BMI estimates do not apply if you’re pregnant. Your GP or health visitor can advise on where your child sits on the ‘centile charts’ used to estimate healthy weights for children. However, there are some situations where BMI may underestimate or overestimate these risks in the 25-35 BMI range. If your BMI is over 35, your weight is definitely putting your health at risk, regardless of the factors below. There is really no such thing as someone who is big-boned." Dr Jan Sambrook, How to lose weight in a healthy wayįor most adults, BMI gives a good estimate of your weight-related health risks. But this causes quite a small variation in weight and is accounted for in the range of healthy BMI. "Some people naturally have a larger frame than others. As levels of overweight or obesity increase, the spotlight has fallen on BMI and its shortcomings as a measure of ideal weight for individuals, rather than whole populations of people where 'averages' apply. Accurate assessments of obesity are important, as being overweight or obese significantly increases your risk of a variety of medical conditions including type 2 diabetes, heart disease and cancer. Children produce less urine than adults, and the amount produced depends on their age.Your BMI, or Body Mass Index, is a measure of your weight compared to your height. Most of the water and other substances that filter through your glomeruli are returned to your blood by the tubules. In a single day, your kidneys filter about 150 quarts of blood. Your blood circulates through your kidneys many times a day. In the nephron, your blood is filtered by the tiny blood vessels of the glomeruli and then flows out of your kidney through the renal vein. ![]() This large blood vessel branches into smaller and smaller blood vessels until the blood reaches the nephrons. How does blood flow through my kidneys?īlood flows into your kidney through the renal artery. The remaining fluid and wastes in the tubule become urine. The tubule helps remove excess acid from the blood. As the filtered fluid moves along the tubule, the blood vessel reabsorbs almost all of the water, along with minerals and nutrients your body needs. The tubule returns needed substances to your blood and removes wastesĪ blood vessel runs alongside the tubule. ![]() Larger molecules, such as proteins and blood cells, stay in the blood vessel. The thin walls of the glomerulus allow smaller molecules, wastes, and fluid-mostly water-to pass into the tubule. The glomerulus filters your bloodĪs blood flows into each nephron, it enters a cluster of tiny blood vessels-the glomerulus. Each nephron has a glomerulus to filter your blood and a tubule that returns needed substances to your blood and pulls out additional wastes.
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