- Grade 11 and 12 Mathematics (Moderator: geoffrey)
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Author Question: It takes a while for new factory workers to master a complex assembly process. During the first ... (Read 704 times) |
- Grade 11 and 12 Mathematics (Moderator: geoffrey)
There are more nerve cells in one human brain than there are stars in the Milky Way.
The familiar sounds of your heart are made by the heart's valves as they open and close.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.