1. Heart is divided into _______ chambers.   Hint First letter clue   2. An average human adult has _______ teeth.   First letter clue   3. Food descends from the mouth to the stomach through a muscular tube known as _______.   First letter clue   4. _______ is a sac-like structure which stores urine.   First letter clue   5. There are total _______ premolars in an adult human being.   First letter clue   6. _______ is a muscular leaf-like structure helpful in swallowing of food and speaking.   First letter clue   7. _______ is a tubular structure through which urine is excreted out of the body.   First letter clue   Skip to Diagrammatic repr... ⇒