Like what you saw?
Create FREE Account and:
- Watch all FREE content in 21 subjects(388 videos for 23 hours)
- FREE advice on how to get better grades at school from an expert
- FREE study tips and eBooks on various topics
M.Ed., Stanford University
Winner of multiple teaching awards
Patrick has been teaching AP Biology for 14 years and is the winner of multiple teaching awards.
The integumentary system is comprised of skin, hair, scales, feathers and nails. The integumentary system protects the body from physical damage and it is the largest organ system, mostly due to the volume of skin. Skin is composed of several layers. In skin, the top layer of skin is called the epidermis, the middle layer is called the dermis and the bottom layer is called the subcutaneous layer.
The integumentary system is a system that a lot of people aren't even aware is there? But it's right there in front of you whenever you look at somebody you're actually seeing their integumentary system. You can't see their digestive system or the nervous system but this is my integument it's the skin. Now a lot of times we think oh what does the skin do? Well its actually involved in a lot of different things. It's involved in protection obviously if I get a fungus on my skin and I just sit there and brush it off how didn't why didn't it detect my muscles? Because my skin is protecting everything underneath, it produces oils that help protect me from water loss and things like that.
It's involved in thermoregulation it can cause the hairs to erect now in humans getting a little goose bumps not so effective if you kitty cat erecting your hair, helps create a greater layer of the thermoregu- thermo protection insulation. I can blush or send a lot of blood vessels open them up in my skin and that's allow me to dump heat out or when I'm getting cold you may notice that somebody gets pale and that because they're constructing the bloods part of their skin to reduce the loss of heat to their skin. We excrete waste I mean that's a lot of what sweat is, there's all sorts of chemicals in there. It's involved in various senses; pain, heat, pressure, touch all these senses are involved in the skin.
Now there's two main layers to the skin. There's the epidermis which is the outer layer and then the dermis is underneath it there's another layer called the subdermis but that's not really part of the integumentary system.
The epidermis is the outer layer of the skin and this is the layer that everybody sits there when you do this you're scratching off epidermal cells but that's okay they're constantly undergoing cell division to replace them so the epidermis is involved in a lot of protection of the more delicate tissues that are underneath like the blood vessels and such. The epidermis doesn't actually have it's own blood vessels.
Unlike the dermis, the dermis does contain the blood vessels that has nerve endings has the sweat glands and everything else that we often think of as the important structures of the skin.
Now that subdermis that I mentioned before is again not technically part of the integumentary System but it is important layer of what we think of as the skin because this is the connective tissue that helps anchor the skin to the lower structures like your muscles and such and it's also often a layer of has layers of fat that help in thermo insulation it also helps in cushioning which specially on our rear ends helps when we sit from damaging our delicate bodies and that's the integumentary system.
Please enter your name.
Are you sure you want to delete this comment?
- Tissues And Organs 26,152 views
- Digestive System 24,454 views
- Muscular System 19,892 views
- Skeletal System 16,934 views
- Endocrine System 19,685 views
- Nervous System 26,836 views
- Sensory System 13,555 views
- Neurons 15,490 views
- Reproductive System 26,788 views
- Respiratory System 18,831 views
- Circulatory System 22,643 views
- Immune System 20,032 views