The two chemicals are paracrine and cytokine.
Meristematic tissue
Epithelial tissue
Skin creates a water proof barrier between the body and environment.
Cold effects the soft tissue long before it has an impact on the skeletal system.
Tissue culture is the growth of tissues in suitable environment. They are used widely in study of maturation and growth of animal cells and plants, in cancer research, in cloning experiments etc.
Meristematic tissue
The blood brain barrier blocks chemicals from entering brain tissue.
One thing that gives chemicals to the body tissue is ingestion. A person can drink anything liquid and have the chemicals in the drink, for instance caffeine, enter into the blood stream.
Blood Plasma.
Examples: strong acids, strong bases, radioactive chemicals.
Epithelial tissue
Hodgkin's disease effects lymph tissue
nervous tissue
Nerve tissue
Yes, a semipermeable membrane selectively allows chemicals to be absorbed into the body. Epithelial tissue covers all parts of the body that has contact to the the outside environment including the gastric tract. One prime example of semipermeable epithelial tissue of the body is the tissue of the intestines which has folds exactly for the purpose of absorbing food.
Yes, the majority do.
The equipment may contain toxic or flammable chemicals.