In simple words, how are body sensations linked to moods and feelings?

My teacher rightly emphasizes that sensations when observed equanimously will lead to eradication of suffering and he is very right. I have noticed a big change. But I just don't get the link between emotions and body sensations. I can understand when I am angry there is heat like sensations immediately, on arousal there are certain sensations although these are kinda on the extreme side and may or May not take excessive meditation to practice. But what about boredom, depression, love, jealousy, greed and so on? Are these sensations linked to the body too? (Stupid question to ask I know since I have been practicing for years now) but I sense results by practice which is great. But on the level of functionality I don't get it. I have read the mahasatipatthana sutta but I wish someone could explain it using normal terminology.