Sensory organs Skin, Tongue & Nose
Layers of Skin
Nose
The
nose has two holes called nostrils. When you inhale air through your nostrils,
The organ for the sense of smell is nose. Nose has nostrils , we breathe in through Nose 👃.
The olfactory Nerve is responsible for our sense of smell and the nose is known as an olfactory organ.
Animals have a stronger sense of smell than human beings.
Human beings can also smell thousands of various odors and fragrances.
For example, we can smell a gas leak.
Tongue 👅 ( Sense of Taste )
The organ for sense of taste is the tongue. The tongue has various receptors which can detect Food salty, sweet, bitter or sour.
The behind part of the tongue detects bitter taste,
frontmost part detects salty taste, the side part detects sour taste and the middle and front part detects sweet taste.
Skin
The skin is the largest organ of the human body.
It is composed of three
layers-
1 Epidermis
2 Dermis
3 Subcutaneous layer.
The epidermis is the outermost layer of skin.
It consists of epithelial tissue in which
cells are tightly packed together providing a barrier between the inside of the body and
the outside .
Below the epidermis lies a layer of connective tissue called the dermis.
In addition to
providing support to the skin, the dermis has many other purposes. It contains blood
vessels that nourish skin cells and nerve tissue that provide feeling in the skin.
It also has muscle tissue that is responsible for giving you "goose bumps" when you get cold
.
The subcutaneous layer is beneath the dermis and consists mainly of a type of
connective tissue called adipose tissue or Fat Tissue. Adipose tissue is more commonly Called as fat
and it helps cushion the skin and provide protection from cold temperatures.
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