In order to understand contemporary psychology, it is important to look back at the origins and influences on this science. Courses on the history of psychology generally begin with the subject's ancient philosophical origins and explore the contributions of major thinkers up through the modern-day.
Spinous cells, or prickle cells, are keratin producing epidermal cells owing their prickly appearance to their numerous intracellular connections. They make up the stratum spinosum (prickly layer) of the epidermis and provide a continuous net-like layer of protection for underlying tissue.hey are pushed upward into the stratum spinosum by the continuous formation of new cells in the basal layer. They reach the outmost layer of the skin as flattened dead flaking skin cells we shed daily. The journey from origin to shed takes 25 to 45 days.
Types of Skin Cells. However, your skin isn't a weakling, and does have a defense mechanism that tries to fight off dangerous ultraviolet rays found in sunlight. In the deepest layer of the epidermis, the stratum basale, which is also sometimes called the basal layer, are cells called melanocytes.These are cells that produce the pigment melanin. It is this substance, melanin, which determines the skin color of an individual.n addition to housing young keratinocytes and melanocytes, the basal layer of your skin also contains other cells, such as Merkel cells, which are cells that are important in the sensation of touch. With all of that in mind, I do have an important point to make.