Nerve fiber layer

conjunctiva i.e. squinting and blinking), eyelashes (short stiff hairs protects the eye from irritants i.e. dust), sclera (smooth white layer that provides safety and an attachment site for the extraocular muscles allowing the eye to move), conjunctiva glands (are layers of mucus that keep the outside of the eye moist), cornea (outer covering of the eye with its several layers providing protection and properly processing the entry of light), lacrimal glands (found of the outer corner of they eye producing

matter, is the most external layer of the brain and predominantly contains neuronal bodies (the part of the neurons where the DNA-containing cell nucleus is located). The gray matter participates actively in the storage and processing of information. An isolated clump of nerve cell bodies in the gray matter is termed a nucleus (to be differentiated from a cell nucleus). The cells in the gray matter extend their projections, called axons, to other areas of the brain. Fibers that leave the cortex to conduct

The general structure of the nervous system is known as the “anatomy of the nervous system” (neuroanatomy). The acts of human beings are guided by controls through the nervous system. A human being’s response to its environment is also through controlled guiding and thoughts (Pinel, 2013). The peripheral nervous system or PNS and central nervous system or CNS are important parts of our nervous systems within hollow tube holding the CNS and PNS of our nervous system (Pinel, 2013). There are subdivisions

The skin has two principal layers, the epidermis and the dermis. The epidermis is the epithelial tissue layer of the skin. Hair follicles, sebaceous glands, and sweat glands are found in this layer. The epithelial layer is primarily used for protection. This layer consists of keratinized stratified squamous epithelium. It is tough, relatively impermeable, and self-replacing. The epidermis is made up of several layers. Stratum corneum are cells of the cornified layer are dead, protective keratinized

THE RETINA: RECEPTOR CELLS The receptor cells are the RODS and CONES. Each consists of: * A process consisting of outer and inner segments. * An external fiber connecting the process with the soma. * A soma or body containing the nucleus. * An inner fiber that resembles an axon and synapses with a bipolar cell. Rods are extremely sensitive to light and can react to a single photon. The light is absorbed by the pigment rhodopsin and the energy acquired results in

inner layers of the retina to reach the photoreceptive layer of rods and cones. 2. When the photoreceptors are stimulated they transmit impulses to the bipolar cells that project to the ganglion cells of retina. 3. The axons from the ganglion cells converge at the optic disc to form optic nerve which enters the cranial cavity through the optic foramen. At the optic disc these axons acquire a myelin coat from oligodendrocytes of the CNS. 4. The optic chiasm is formed by decussating fibers, which

causes a rapid stop of regeneration of damaged axons. The site of a spinal cord injury as a result of the phenomena occur eventually to produce a cavity filled with liquid syringomyelic CSF and covered with a layer of glial scar. This scar and cavity form a loss of continuity of long nerve pathways of the spinal cord and prevent the occurrence of neuronal regeneration process. Work on cellular therapies allowed researchers to isolate and implement of clinical transplantation experiments olfactory

Peritoneum is a thin, extensive sheet of serous membrane and it is the largest of the body cavities (peritoneal cavity) and the most complexly arranged membrane in the body (Tirkes et al., 2012). Two continuous layers make up the peritoneum; the parietal peritoneum and the visceral peritoneum. Layers of peritoneum The parietal peritoneum lines the wall of the abdominopelvic cavity. Anteriorly, it joins the transversalis fascia, with the interposition of a fatty connective extraperitoneal

Nerve: In the control group, sections of the nerve showed myelin sheaths wrapping around the axons which were centrally placed. The nuclei of the Schwan cells are elongated and oriented longitudinally. The transverse sections of the nerve showed the bundles of the axons covered by the perineurium. In the diabetic group, there was splitting of the axon bundles and wide interruptions in the nerve fibers. Increased connective tissue proliferation was seen

Organ Trail Epithelium: Tissue that covers the whole surface of the body. composed of tightly packed cells arranged in one or more layer, and forms covering, or living of all internal and external body surface. function: 1: It protects us from the outside world – skin. 2: Absorbs – stomach and intestinal lining 3: Filters 5 the kidney 4: Secretes – forms glands Characteristics: Closely attached to each other forming a protective barrier 2) Always has one free surface open to outside