Humans use their lungs to breathe. The process begins when we inhale air through our nostrils. From this point it gets to the lungs where the oxygen comes in contact with the surface of the lungs and subsequently to tiny units of the lungs called the alveoli. However to understand the process of breathing, it is a great idea to start with the human lungs diagram. This page features and interactive online worksheet version of the diagram of the human lungs to label. It is a game that features parts of the lungs scrambled to a corner. Students are required to drag and place the labels in the right positions. Keep practicing until you master this biology and anatomy skill. Students will love playing this game online. It is free and can be accessed at all times of the day. This exercise is for students in 1st, 2nd, 3rd, 4th, 5th, 6th and 7th grades.