1. Kidneys are the main _______ organs.   Hint First letter clue   2. Blood is distributed to various parts of the body through blood vessels known as _______.   First letter clue   3. Heart lies on the left side of the _______ cavity.   First letter clue   4. _______ is also known as 'voice box'.   First letter clue   5. Complex food particles are broken into simple food particles through the process of _______.   First letter clue   6. _______ are the organs of hearing.   First letter clue   7. _______ are the main respiratory organs.   First letter clue   Skip to Diagrammatic repr... ⇒