|
|
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.
![Apply circular friction to the left side of the neck along cervical muscles with the fingertips of ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_1_47_39_331111906.jpeg)
![Apply passive touch on the shoulder and hip. Stand in back and place one hand on the shoulder and ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_7_22_06_333361.jpeg)