Stratum

Stratum 800 lacks cultural material, so it was uninhabited. Seven radio-carbon samples were dated, which gives this stratum a mean calibrated date of 100 BCE ± 100. Stratum 700 was also uninhabited because it lacks cultural material. Three post holes were cut into the top of this layer (features K, L, and M). This building was constructed during the time of Stratum 600, and none of it remains due to the fire that formed Stratum 600. Stratum 700 is given start and end dates based off the the Law of Superposition. Its start date is 200 - 1 BCE, and its end date is 43 CE. Stratum 600 was a layer of ash filled with flecks of charcoal in all sizes. Its start date comes from a coin of Claudius. Claudius ruled Rome as emperor from 41-54 CE, so…

Evolutionists use the geological column as a means of supporting their theory of evolution. The geological column is the theory of a sequence of rocks extending through time from the oldest at the bottom to the youngest mud, dirt and sand deposited on the surface. In many locations around the world, fossils have been discovered that run through many layers of rock. These fossils are known as polystrate fossils. This occurs when a fossil is deposited quickly and through a very large event, such…

In your own words, explain why the stratum corneum is so important when discussing dermal absorption? The Stratum Corneum is the outermost layer of the epidermis and it is made up of stratified squamous epithelium with no blood vessels. As the cells of the epidermis divides and age, the older epidermal cells are pushed away from the dermis to the epidermis towards its outer surface (stratum corneum). It would be right to describe the stratified squamous cells of the stratum corneum as many…

In thin skin, which covers the rest of the body, the stratum lucidum appears to be absent and the other strata are thinner. The stratum basale is the deepest epidermal layer that consists of a single row of cells, representing the youngest keratinocytes. This layer is also known as the stratum germinativum because rapid cell division occurs with the cells that make up this layer of the skin. The stratum spinosum consists of several cell layers that contain a weblike system of intermediate…

Layers of Epidermis: 1. Stratum basale: The stratum basale or stratum germinativum is a continuous layer which gives rise to keratinocytes. It is usually described as one cell thick .this is the base or bottom made of living cuboidal keratinocytes that undergo cell division (mitosis ) they also have melanocytes that make melanin( dark pigment ). 2. Stratum Spinosum: the stratum spinosum or prickle cell layer is so called because the cells are given a spiny appearance by the numerous desmosomes…

These five layers of the epidermis are stratum basale, stratum spinosum, stratum granulosum, stratum lucidim, and stratum corneum. The stratum basale is the deepest layer in the epidermis which contains a single row of stem cells that are constantly going through mitosis. Every time a cell divides, it pushes the more mature keratinocyte up the epidermal layer to produce more keratinocytes (Marieb and Hoehn, pg.153). The stratum spinosum layer contains several cell layers which are sustained by…

Integumentary System: Anatomy and Physiology of the Skin The skin covers the entire body surface, making up most of a humans body weight. Skin tissue provides the human body with protection from mechanical, chemical, thermal damage, and bacteria. Along with this, the skin provides insulation while regulating heat and cushioning for tissues and organs. This body system also helps with the prevention of water loss, but also allows excretion of things such as urea, salts, and water. The skin has…

This novel route, have several characteristics to distinguish them from the more traditional target specific route available. The difference between normal skin and the lip skin. The labial skin on our lips looks clearly different from the rest of our body [38]. That is because it is much thinner in comparison to normal skin. Skin is divided in three separate layers - the stratum corneum, the epidermis and the dermis [39]. The protective stratum corneum is the outer layer that we can see, the…

Epidermis is the tough outermost layer of the skin, and is made up of the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. It is mainly comprised of the protein keratin, squamous epithelial cells and melanin. The epidermis acts as a waterproof barrier and the melanin absorbs ultra violet light to prevent burns, inflammation, and swelling of the skin. Dermis is the lower layer of the skin that contains collagen, nerve fibers, lymph vessels, and blood…

Cargill et al. (2007) and Tsoi et al. (2012) show that psoriasis vulgaris is a homeostatic disorder of the skin that interrupts the normal proliferation, differentiation and maturation of epithelial cells in the stratum corneum. The focul site of psoriasis vulgaris, called psoriatic, lesions contain higher than normal levels of T Cells, leading to the conclusion that psoriasis vulgaris is a T Cell mediated response to external triggers of either the skin or the immune system (Roberson &…