many substances like sweat which is a combination of salt and water,hairs,and many other things...:)
Oils on skin surface
skin tissues, mussle tissues, organ tissues and bone tissues.
Skin protects the inside of the body from bacteria. If it weren't for skin, we would get infections way too easily and certainly would not be able to survive. Not only just bacteria, but from viruses, parasites, and fungi too. A substance called melanin protects your skin from burns.
We have to wear gloves when we are working in the lab because the skin of our hands is like a sponge. Our skin is not 100% closed and therefore anything we touch can be absorbed into our skin and go into our bloodstream. And so if you're working with any kind of substance that is harmful to your body it can get into your bloodstream through your skin and cause harm.
how a substance that helps a plant grow wellhow a substance that helps a plant grow well
Receptor molecules are found on cell surfaces and respond to nerve and hormone signals.
There is a cholesterol that is found in the skin that will help to absorb the vitamin D that you get from the sun. This substance is called 7 dehydrocholesterol.
Drug
drugs
A toxin.
The substance that gives skin and hair its pigment is called melanin. Melanin is produced by melanocytes, which are cells found in the skin and hair follicles.
the skin the lungs and the mucus membranes lining the throat
Elastin and collagen.
its found in the epidermal layer of the skin
Keratin is a nonliving protein substance found in hair, nails, and the outer layer of skin. It provides structure and strength to these tissues.
Epithelial tissue can be found covering the surfaces of organs in the body, such as the skin, lining the digestive tract, respiratory tract, and blood vessels. It also lines body cavities and forms the outer layer of the skin.
the black substance obtained on the skin after hard rubbing are actually the dead cells of the skin epithelium which on rubbing mixes with the natural moisturizer i.e. sebum and comes on the skin as the black substance