Light enters the eye through the pupil, and the iris regulates the amount of light by controlling the size of the pupil. The iris contains two groups of smooth muscles; a circular group called the sphincter pupillae, and a radial group called the dilator pupillae.
Jalapeno peppers are used to flavour chilli The ingredient which makes jalapeno peppers hot also makes prostate cancer cells commit suicide, a study suggests.
Beta-glucans have been studied in people with certain types of cancer. For example, one study showed that combining a type of beta-glucans called lentinan with chemotherapy can help people with gastric cancer live longer. More research is needed to see how effective it might be.