The average human pregnancy is 40 weeks long. However, a pregnancy is considered full term between week 37 of pregnancy and week 42 of pregnancy. Babies born during week 36 of pregnancy or earlier are considered preterm or premature. Babies born during week 43 of pregnancy or after are consider post-term or post-date.
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When you first smell a food, or maybe even think about it, your mouth produces saliva, which helps to break down chemicals in the food. When you are done chewing, your tongue pushes the food down into the opening of your esophagus, which is the second part of the digestive system process. The epiglottis is the small piece of tissue that helps the food go into your esophagus instead of somewhere else.