So what exactly is the integumentary system? Well, to put it simply - it’s your hair, skin, and
nails. To put it more scientifically, it’s the epidermis, dermis, hypodermis, associated glands,
hair, and nails. You get the gist!
The integumentary system is the largest organ of the body! It forms a physical barrier
between the outside environment and the inside environment of our bodies. Its main job is
to protect all the vulnerable things within as well as maintain them. It’s your body’s first line
of defense against pathogens so it plays an important role in immunity. This system also
orchestrates wound healing, regulates body temperature, helps to synthesize Vitamin D, and
detect stimuli.
Your skin is a tightly knit network of cells, making it very durable against everyday wear and
tear. The epidermis is that top layer that you can see and feel. The dermis is the layer below
that, which contains blood and lymph vessels, nerves, sweat glands, and hair follicles.
Then there is the hypodermis. It’s the connective tissue that provides additional cushion and
insulation through fat storage. It also connects the top layers of skin to underlying
structures like muscles and organs.
Hair comes from the epidermis but grows its roots deep into the dermis. It mainly serves to
protect the skin, increase sensory function, and aid in regulating body temperature. Hair
also filters harmful particles from entering the eyes, ears, nose, etc.
Nails form as layers of keratin on the tips of fingers and toes. Nails have an important job -
to protect the fingers and toes, which are prone to repeated trauma. Nails also help increase
the precision of movements and enhance sensation.
Now that you’ve got the basics down, let’s see what things can DISRUPT this intricate
system. Eeek!!