The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that all cells come from preexisting cells, that vital functions of an organism occur within cells, and that all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells. The DNA from those cells may trigger an inflammatory 
reaction as the dead cells combine with other substances.Once the macrophages and other immune system components have essentially digested the body's dead cells, the cells make their way through the bloodstream and eventually into the digestive system for final disposition. There are 3 classes of cells in the human body. Labile cells, stable cells, and permanent cells. Labile cells are dividing all the time--always in the cell cycle. Examples include cells in the digestive tract, skin, respiratory tract, Stable cells are in Gap O most of the time in the cell cycle, but can be stimulated to enter the cell cycle when needed.
# Ribosomes
* composed of rRNA (ribosomal RNA) & protein
* may be dispersed randomly throughout the cytoplasm or attached to surface of rough endoplasmic reticulum
* primary function is to produce proteins
* often linked together in chains called polyribosomes or polysomes
COMPONENTS OF THE CELLULAR ENVIRONMENT
* comprises 60 - 90% of most living organisms (and cells)
* important because it serves as an excellent solvent & enters into many metabolic reactions
When external skin cells die, there are a number of mechanical and chemical methods used to slough them off. Exfoliants and scrub brushes are often employed to remove dead cells and encourage new cell turnover.
reaction as the dead cells combine with other substances.Once the macrophages and other immune system components have essentially digested the body's dead cells, the cells make their way through the bloodstream and eventually into the digestive system for final disposition. There are 3 classes of cells in the human body. Labile cells, stable cells, and permanent cells. Labile cells are dividing all the time--always in the cell cycle. Examples include cells in the digestive tract, skin, respiratory tract, Stable cells are in Gap O most of the time in the cell cycle, but can be stimulated to enter the cell cycle when needed.# Ribosomes
* composed of rRNA (ribosomal RNA) & protein
* may be dispersed randomly throughout the cytoplasm or attached to surface of rough endoplasmic reticulum
* primary function is to produce proteins
* often linked together in chains called polyribosomes or polysomes
COMPONENTS OF THE CELLULAR ENVIRONMENT
* comprises 60 - 90% of most living organisms (and cells)
* important because it serves as an excellent solvent & enters into many metabolic reactions
When external skin cells die, there are a number of mechanical and chemical methods used to slough them off. Exfoliants and scrub brushes are often employed to remove dead cells and encourage new cell turnover.
