Use the general features of all epithelia and connective tissues to compare and contrast the epidermal and dermal tissues. Define what a stem cell is in all tissues and describe how the stem cells of the stratum basale divide to replenish the epidermis. Describe the functions of three non-keratinocytes (tactile or Merkel cells, dendritic cells and melanocytes) within the epidermis. strata.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?