Blemishes are caused due to hormonal changes, hereditary factors, stress, lack of proper nourishment. When the pore is clogged by natural body oils, the pores can get infected by bacteria and develop into black heads or white heads. If you prick or squeeze the acne lesion it will lead to scars or minor blemishes.
Making the world better, one answer at a time. Endothelial and epethelilal cells are the two different cell types which sandwich together the tissue. On the blood side is the endothelial cells (endo, meaning inside), and on the outer side are the epethelial cells.or example the epethelial cell layer are the cells that coat the intetestine wall, and thus absorb nutrients and the the endothelial cells are the cells that face the blood,and release those nutrients into the blood.
1 Epithelial tissue is polarized. 2  An epithelium has a free surface, the apical surface, exposed to the outside, and an attached surface, the basal surface, resting on the underlying connective tissue. 3  In a simple (single-layered) epithelium, each cell is polarized.