Fill in the Blanks The sensory system 2Online version Text to be completed by the student. Unit 1. Natural Science 6 primary by Guillermo Ferrando Valverde 1 pituitary temperature nasal cavity sweet touch taste buds touch tongue bumps The sense of smell . Olfactory receptors are in the next to the area . the sense of smell needs the sense of in order to work properly . The sense of taste . Taste receptors are on the . They are small called taste . Taste buds help us taste the difference between , sour , bitter and salty flavours . The sense of . The skin is the main organ of . Touch receptors can detect , pressure , pain and texture .