the system of organs in humans and animals that separates food into smallerparts that the cells can absorb and use. The oesophagus, the stomach, and the intestines are all part of the alimentary canal. 消化道;食道
an expression meaning a person's rectum (=the part of your body where solid waste comes out), used for example by doctors to avoid embarrassing people 直肠
the process in which chemicals in the body separate large food molecules into smaller ones so they can pass through the wall (=outer layer) of the intestine
a system for measuring how quickly different foods allow the sugar they contain to spread into the blood. Foods that do this slowly are thought to be better for your health.
all the chemical processes by which cells produce the energy and substances necessary for life. Food is separated into the parts it is made up of to produce heat and energy, to repair tissues, and to help growth to happen 新陈代谢
a system for measuring how quickly different foods allow the sugar they contain to spread into the blood. Foods that do this slowly are thought to be better for your health.