I havve found these useful lessons about the senses from The Children’s University of Manchester (Interactive, online learning for key stage 2 from The University of Manchester, even if our syllabus fits ks3 and 4, we can get a profit from this good visual resources)
About the ear: How do we hear? –You will learn the anatomy of the ear, how it works, and some curious data. By the mid lesson there is a labelling activity and at the end a Quiz.
Same plot about the eye: How do we see?