Editing Skin (section)

==== Overview ====
[[File:FrogSkin.png|thumb|616x616px|'''Frog gland anatomy–''' A: Mucous gland (alveolus), B: Chromophore, C: Granular gland (alveolus), D: Connective tissue, E: Stratum corneum, F: Transition zone (intercalary region), G: Epidermis (where the duct resides), H: Dermis]]

Amphibians possess two types of [[gland]]s, [[Mucous gland|mucous]] and granular (serous). Both of these glands are part of the [[integument]] and thus considered [[cutaneous]]. Mucous and granular glands are both divided into three different sections which all connect to structure the gland as a whole. The three individual parts of the gland are the duct, the intercalary region, and lastly the alveolar gland (sac). Structurally, the duct is derived via [[keratinocyte]]s and passes through to the surface of the [[Epidermis|epidermal]] or outer skin layer thus allowing external secretions of the body. The gland alveolus is a sac-shaped structure that is found on the bottom or base region of the granular gland. The cells in this sac specialize in secretion. Between the alveolar gland and the duct is the intercalary system which can be summed up as a transitional region connecting the duct to the grand alveolar beneath the epidermal skin layer. In general, granular glands are larger in size than the mucous glands, which are greater in number.<ref name=":0">{{cite journal |last1=Toledo |first1=R.C. |last2=Jared |first2=C. |title=Cutaneous granular glands and amphibian venoms |journal=Comparative Biochemistry and Physiology Part A: Physiology |date=May 1995 |volume=111 |issue=1 |pages=1–29 |doi=10.1016/0300-9629(95)98515-I }}</ref>