However, in this organ of the excretory system, you will witness the absorption of leftover substances, including salts, minerals, vitamins and water. In this way, the majority of the waste and harmful substances is excreted out of the body in the form of semi-solid mass, called feces.
There is no such thing as petty or mean person who is happy with themselves; rather they would be described as insecure, jealous, angry, envious, spiteful, and in constant need of attention.
The definition of guileless is candid,  without deception or naive. An example of someone who is guileless is an honest and innocent girl who just arrived in a big city and who believes that everyone is as honest and good as she. YourDictionary definition and usage example.