The Senses

1. Hearing

1.1. Frequency range of 20-20000 Hertz

1.2. High frequencies decline with age

1.3. Deafness

2. Smell

2.1. Nose

2.2. Anosmia

3. Taste

3.1. Taste buds

3.1.1. Umami

3.1.2. Sourness

3.1.3. Bitterness

3.1.4. Sweetness

3.1.5. Saltiness

4. Sight

4.1. Rods

4.2. Cones

4.3. Blindness

5. Touch

5.1. Skin

5.2. Anesthesia