Sense Organ & Their Function

[Audio] Sense Organ & Their Function Name: Bihan Maharjan Class: 6 ‘A’ Roll no: 2021037.

[Audio] INTRODUCTION Our body is made up of millions of cells. Cells are basic structural and functional units of human body. Cells are combined together to form tissues and tissues are combined together to form organs. There are five sense organs in our body. They are: 1. Eyes 2. Nose 3. Ears 4. Tongue 5. Skin.

[Audio] EYES Eyes are the most important sense organ of human body. Human being have two eyes located in facial region. Function: Eyes help us to see things around us. They help us identify colors. They help us read and write..

[Audio] . INTERNAL STRUCTURE OF HUMAN EYE Cornea Transparent front cover of the eye Iris Coloured part of the eye Pupil Black opening in the centre of the iris Lens Transparent and flexible; changes shape to focus light Ciliary Muscles Hold the lens and change its shape -7 Sclera Tough white outer coat that protects the eye Choroid Layer with blood vessels that supplies the eye with oxygen and nutrients Retina Light-sensitive layer at the back of the eye Optic Nerve Sends signals from the eye to the brain.

[Audio] 2. NOSE Nose is another sense organ located in the facial region. The nose is divided into two chambers by a septum. Function: It helps us get the sensation of smell. It helps in breathing. The hair present in the nostrils helps prevent the dust and germs to enter our body..

[Audio] . Olfactory nerves Help to detect smell Nasal hairs Trap dust particles and germs Nostrils External openings of the nose Internal Mucus Structure of Nose Traps dust and germs and keeps the nose moist Nasal bone Gives shape to the nose Opening to throat Leads to the pharynx (throat).

[Audio] 3. EARS Ear is an important organ of human body. It is divided into three different regions. They: External ear Middle ear Internal ear.

[Audio] External Ear It is the outer visible part of the ear. It has three parts. They are pinna, auditory canal and ear drum..

[Audio] Middle Ear The region of ear between external and internal ear is called middle ear. It is located behind ear drum..

[Audio] Internal Ear Internal ear is the innermost part of the ear..

[Audio] Function of ear The ear helps us to hear sounds. They send sound signals to the brain for understanding. They help us to identify the direction of sound.

[Audio] 4. TONGUE Tongue is the sense organ which helps us get the sensation of taste. It is a soft muscular organ located in the mouth cavity. It is an important organ of digestive system. Function: It helps us to speak. It gives the sensation of taste. The tongue helps us to chew and swallow food..

[Audio] . Phryngeal patt Oral part Aakash Mom tlbJtt Papillae Sulcus terminals.

[Audio] 5. SKIN Skin is the organ which gives the sensation of touch. In human body skin forms the outermost covering layer. The outer layer of the skin is a lifeless layer which does not contain blood vessels. Functions: It gives the sensation of touch, pain, temperature etc... It is the tough layer of body. It protects our body from external environment..

[Audio] . epidermis dermis subcutaneous tissue (fat).

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