Instructions for the students: Read the questions and answer all the questions independently. 1. Fill in the blanks. (2 a. The_______ is important for chewing, mixing and swallowing. b. The_______ cells in blood protects us from infection and diseases. is a muscular sack used to store the food that we eat. C._________is a muscular sack used to store the food that we eat d. The vessels that carry blood from various organs towards heart are called_____