Does the upper or lower level of the leaf have more chlorophyll? how do you know? why is this important to the funcion of the leaf

The upper part because it is the part that is most exposed to the sun. This is important the chlorophyll gives the leaf it's color. 

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.