|
|
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.
![Physiological effects of the accumulation of lactose in the intestines of a lactose-intolerant indiv](https://biology-forums.com/gallery/47/medium_274247_21_01_15_7_40_16_20282429.jpeg)
![(A) Dilation stage: uterine contractions cause dilation of the cervix; (B) expulsion stage: birth, ...](https://biology-forums.com/gallery/47/medium_660366_15_03_17_5_37_23_27147687.jpeg)