1. _______ is a sac-like structure which stores urine.   Hint First letter clue   2. Oral cavity remains moist due to presence of a fluid known as _______.   First letter clue   3. _______ is a muscular leaf-like structure helpful in swallowing of food and speaking.   First letter clue   4. An average human adult has _______ teeth.   First letter clue   5. A healthy human adult has _______ bones.   First letter clue   6. _______ is also known as 'voice box'.   First letter clue   7. Blood is returned to the heart from various body parts through blood vessels known as _______.   First letter clue   Skip to Diagrammatic repr... ⇒