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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.
Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
![Polycystic kidney disease. Notice the presence of numerous fluid-filled sacs, or cysts, in these kid](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_19_57_9665633.jpeg)
![Gastric cancer. In advanced stages of gastric cancer, malignant cells spread to form tumors in the l](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_23_00_96842099.jpeg)