Atrophy of muscle or of muscle and bone. Local atrophy of muscle, bone, or other tissues results from disuse or diminished activity or function. Although the exact mechanisms are not completely understood, decreased blood supply and diminished nutrition occur in inactive tissues.
What are the basic tissues of the body?
- These are commonly referred to as the Primary (Basic) tissues of the body. The basic tissues of the body include: • Epithelial (Covering) Tissue (See Diagram EP 1): Epithelial tissue covers the external and internal surfaces, including cavities and tubes of the body. Three different shapes of cells are encountered in the epithelium.
What is nervous tissue?
- The nervous tissue makes up the nervous system of the body. This comprises the brain cranial nerves, spinal cord, spinal nerve fibres and several receptor cells and organs. The human body performs various functions each of which requires the input of various specialized organs of the body.
Why don't blood vessels in underlying connective tissue penetrate the epithelium?
- Blood vessels in underlying connective tissue do not penetrate the basement membrane to reach the epithelium; thus, all gases and nutrients carried in the blood must reach the epithelium by diffusing from blood vessels with many layers of cells, the most metabolically active cells are close to the basement membrane, 6.
Muscular dystrophy is a group of inherited diseases characterized by weakness and wasting away of muscle tissue, with or without the breakdown of nerve tissue. There are 9 types of muscular dystrophy, with each type involving an eventual loss of strength, increasing disability, and possible deformity.