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Your heart beats over 36 million times a year.
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
![In a craniotomy, a portion of the skull and overlying scalp is pulled back to allow access to the br](https://biology-forums.com/gallery/47/medium_14755_07_10_12_3_19_34_9330731.jpeg)
![A replaceable PROM used in an older General Motors computer. Notice that the sealed access panel ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_8_05_55_298772489.png)
![Many electronic components are used to construct a typical vehicle computer. Notice the quantity of ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_8_05_56_298821042.png)