Although the anaconda is a thicker, heavier snake, some pythons are the world's longest snakes. The reticulated python of Southeast Asia has an average length of up to 4 to 6 meters (13 to 21 feet), the largest measuring 9.7 meters (nearly 32 feet).
One of the most common drugs used in the labour ward is pethidine, a synthetic, addictive, narcotic drug that is similar to morphine. In Britain it is also known as meperidine, and in America it is known as Demerol.
1 The drug causes the blood vessels to dilate. 2  During labor, a woman's cervix will dilate to about 10 centimeters. 3  The drug dilates the blood vessels. The drug causes the blood vessels to dilate. 2  During labor, a woman's cervix will dilate to about 10 centimeters. 3  The drug dilates the blood vessels.