2. Functions
Molecules of oxygen and carbon dioxide are passively exchanged, by diffusion, between the gaseous external environment and the blood.

3. Trachea: Trachea is a common term for an airway through which respiratory air passes in organisms.
Lungs: Your lungs are in their simplest form nothing more than sacks. As you breath in, you fill these sacs with fresh oxygen rich air. Your heart pumps blood into the walls of your lungs, where it absorbs oxygen, and releases carbon dioxide. As you exhale, or breath out, you release the carbon dioxide rich air into the space around you. Each breath you take, you are taking oxygen in, and putting carbon dioxide out.
Diaphragm:The diaphragm functions in breathing. During inhalation, the diaphragm contracts, thus enlarging the thoracic cavity (the external muscles also participate in this enlargement).

4. Epiglottis: The epiglottis guards the entrance of the glottis, the opening between the vocal folds.
Larynx:Sound is generated in the larynx, and that is where pitch and volume are manipulated.
Vocal Cords: They produce sound.

5. How my body works with other system in the body
Lungs: they work in respiratory and excretory.
Diaphragm: they work in the muscular system and respiratory.
Lungs: take oxygen and put in blood stream.

6. Facts The male vocal folds are between 17 mm and 25 mm
Neck at the level of the C3–C6 vertebrate
Every minute we breathe, we take in 13 pints of air! That is we breathe about 6.15 liters of air every minute.
We breathe about 9 to 20 times every minute