Bioengineering and biomedical engineering merge the disciplines of engineering, biology, and medicine to create techniques and devices that are based on an understanding of living systems and serve the objective of improving the quality of human and animal life.
Weight of 1 US Gallon of water = approx. 8.35 lb (about 3.785 kg). Weight of 1 Imperial gallon (i.e. UK measure) of water weighs 10 pounds (4.536 kg) by definition, at a specified temperature and pressure.
There is also a fluid ounce, 1/128 of a US gallon, about 29.57 mL and an Imperial fluid ounce, 1/160 of an Imperial gallon, about 28.41 mL. A (US) gallon of water weighs about 8.34 lb at temperature of maximum density (4 C) and gasoline floats on water because it weighs less, around 6.2 lb/gallon.