The buoyant force on a submerged object is equal to the weight of the fluid displaced. This principle is useful for determining the volume and therefore the density of an irregularly shaped object by measuring its mass in air and its effective mass when submerged in water (density = 1 gram per cubic centimeter).uoyancy arises from the fact that fluid pressure increases with depth and from the fact that the increased pressure is exerted in all directions (Pascal's principle) so that there is an unbalanced upward force on the bottom of a submerged object.
Keratinocytes from the stratum corneum are eventually shed from the surface (desquamation). The epidermis contains no blood vessels, and cells in the deepest layers are nourished by diffusion from blood capillaries extending to the upper layers of the dermis.eratinocytes from the stratum corneum are eventually shed from the surface (desquamation). The epidermis contains no blood vessels, and cells in the deepest layers are nourished by diffusion from blood capillaries extending to the upper layers of the dermis.
12. The layer of epidermis that undergoes mitosis and forms new epidermal cells is the stratum. basale. granulosum. lucidum. corneum. 13. Intact skin provides protection because. it forms a physical barrier against the entry of microbes. its secretions keep the skin slightly acidic.. Epidermis is characterized by being _______, whereas dermis is distinguished by being _______. the innermost layer of the skin; under the epidermis. composed largely of connective tissue; composed of stratified squamous epithelial tissue.