2) a structural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of:

What is the type of contaminant that can cause foodborne illness

Which of the following is a true statement? a. the male sex hormone is called estrogen. b. the female sex hormone is called testosterone. c. both sexes manufacture some amount of the sex hormone associated with the opposite sex. d. only males secrete testosterone and only females secrete estrogen

Which of the following requires the action of a first class lever in the body