1. _______ is also known as 'voice box'.   Hint First letter clue   2. Salivary glands secrete a fluid known as _______ which helps in digestion as well as in swallowing of food.   First letter clue   3. Kidneys are the main _______ organs.   First letter clue   4. _______ is a sac-like structure which stores urine.   First letter clue   5. Oral cavity remains moist due to presence of a fluid known as _______.   First letter clue   6. _______ are the main respiratory organs.   First letter clue   7. _______ is a muscular leaf-like structure helpful in swallowing of food and speaking.   First letter clue   Skip to Diagrammatic repr... ⇒