After completion of this lesson, student must be able to:
The organs which make us aware about the surroundings are called sense organs. The sense organs are eyes, skin, nose, ear and tongue. Sensation is received by sense organs and is change into electrical signals called impulse. This note gives us the information about sense organs, eye, working of human eye along with pictures.
The ears have two types of receptors. They are phonoreceptor and statoresreceptor. Pinna is immovable and it is supported by an elastic cartilage which has a funnel-shape aperture called concha. External auditory canal is an oblique and tubular canal which runs inward from the canal to the ear drum. This note gives us the information about the sense of hearing: the ear.
The tongue is a muscular organ in the mouth cavity. The skin consists of three layers: Epidermis, Dermis and Sub-cutaneous. The nasal cavity is divided into two nostrils by a vertical septum. This note provides us the information about sense organ of taste, touch and smell.