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Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
Did you know?
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
Did you know?
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
Did you know?
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
![A rocky shore at low tide, showing the great abundance that can be attained by populations of intert](https://biology-forums.com/gallery/47/medium_33_28_08_11_12_16_04_1593395.jpeg)
![A lack of fuel flow could be due to a restricted fuel-pressure regulator. Notice the fine screen ...](https://biology-forums.com/gallery/30/medium_548020_30_05_17_11_26_25_300051630.png)