They also are found to have varying degrees of vascularity. For example, a bone would be very vascular while cartilage is avascular. Two good property the cells of connective tissue have is that they can divide and repair themselves. The functions of these tissues are: to bind structures, support, protect, serve as framework, store fat, produce blood cells and repair damage. Cell Types There are three major cell types of connective tissue: Fibroblasts, Macrophages, and Masts.
The proliferative phase is the “growth” phase in which collagen fibers are continually sent to aid in the regrowth of the epithelial cells as well as the blood vessels. The final phase includes the shedding of scab once the epidermis reaches normal thickness and everything is restored. Occasionally during deep wound healing, the tissue may lose some of its functions. The skin is the largest organ in the human b... ... middle of paper ... ...des, cholesterol, proteins, and inorganic salts. The sudoriferous gland is referred to as the sweat gland.
Prints are one of a kind so no two people can have the same prints. This just increases the importance of prints so that ... ... middle of paper ... ...ade for fibers such as cloth fibers. Again this can rule out suspects based on if they have the right clothes but it cannot place someone at the crime scene unless something rare is found. Even in that case a suspect may still be able to discard the clothes but they cannot discard the prints on their body. Prints are the most important evidence in solving a crime because prints are left everywhere anyone touches, they are not easily covered up, all prints are unique, and because many parts of your body produce prints without you even trying.
The individualistic characteristic is a key feature of DNA that assists in solving... ... middle of paper ... ...ght crime, but funding sources can slow the process. If funding is not available for states to reduce their current offender backlogs, databases will remain unavailable to aid law enforcement with criminal investigations. . It is up to the criminal justice system is to realize the “full potential of DNA evidence as a crime fighting tool” (Wilson, Forman, & Asplen 1999), efforts must be made both to solve the database backlog of today and to promote DNA evidence use throughout all levels of law enforcement. As criminals become cleverer, evidence like DNA becomes even more important.
The shaft of each hair consists of three layers which include the cuticle, the cortex and the medulla. The cuticle of the hair is a translucent outer layer of the hair shaft. The cuticle is made up with three different types of scales that cover the shaft: coronal, spinous and imbricate scales. The cortex is the main body of the hair and it is composed of elongated spindle-shaped cells. Sometimes the cortex “may contain cortical fusi, pigment granules, and/or large oval-to-round-shaped structures called ovoid bodies (Deedrick, 2004).” Ovid bodies are mainly found in animal fur and are extremely rare to be found in human hair.
The cytoskeleton is a highly dynamic intracellular platform constituted by a three-dimensional network of proteins responsible for key cellular roles as structure and shape, cell growth and development, and offering to the cell with "motility" that being the ability of the entire cell to move and for material to be moved within the cell in a regulated fashion (vesicle trafficking)’, (intechopen 2017). The cytoskeleton is made of microtubules, filaments, and fibres - they give the cytoplasm physical support. Michael Kent, (2000) describes the cytoskeleton as the ‘internal framework’, this is because it shapes the cell and provides support to cellular extensions – such as microvilli. In some cells it is used in intracellular transport. Since the shape of the cell is constantly changing, the microtubules will also change, they will readjust and reassemble to fit the needs of the cell.
The second layer of skin is the dermis. The dermis is under the epidermis and is tough connective tissue that contains sweat glands and hair follicles. The dermis has a lot of jobs, including helping people feel things. It sends signals to the human brain so people know if something hurts. It is also where hair is grown, from the root up.
The dermis is what holds the body together. The dermis has layers to it as well as the epidermis. There are two layers to the dermis, the papillary layer and the reticular layer. The cells of the dermis are fibroblast, macrophages, mast cells, and scattered white blood cells (wbc’s). the dermis is richly supplied with nerve fibers and BV;s. dermal BV’s is also a part of the integumentary system, dermal BV,s have converging and diverging vessels that ar... ... middle of paper ... ...may have the same symptoms.
They have several different factors that determine hair color such as melanin containing iron and sulfur. If there is a lack of melanin, the hair will be white or gray. Stem cells located in the dermis are responsible for the production of hair. The shape and texture of the hair follicle determine an individual’s hair. The growth process of hair goes through the following three phases.
An extracellular matrix is a structure that is made of proteins, glycoproteins and other materials that cells are surrounded by or in contact with. Cells inside or near the matrix create the matrix by secreting these substances. Cells interaction with the ECM is very important for several reasons. Contact with an extracellular matrix is fundamental to the organization of both the cell and the tissue of which the cell is a part. Cell matrix interactions maintain and regulate cell adhesion and motility.