Something that very few people know the true meaning of. Even though deja vu is French for already seen, it actually is used to describe the strange feeling you get when you're in a situation, and feel like you've been in the exact same situation before, but really haven't. Most people think it means the same thing happening twice, which is wrong. Get it right people!
Muscle tissue functions mainly as a source of power and motion in the body. Muscles' main responsibility is for changing or maintaining posture, locomotion, and movement of internal organs. The human body has about 650 muscles, which make up approximately half our bodyweight. All muscles are basically made of the same material, a kind of elastic tissue; packages of stretchable fiber-like material, similar to what goes into making a rubber band. Each muscle is made of thousands, and sometimes tens of thousands of small musculus fibers. Each muscle fiber is about 40 mm in length and is made up of tiny strands of fibrils. Each muscle fiber is commanded by a nerve which makes it contract. How strong a muscle is depends mainly on how many fibers are present.
A tissue is composed of similarly specialized cells that perform a common function in the body. Epithelial Tissue. Epithelial tissues cover the body surface, line most cavities, and form glands.Functions include protection, absorption, secretion, and filtration.lood. A type of connective tissue in which the extracellular matrix is liquid and contains soluble proteins that aren't made by the cells of the tissue (exception: some leukocytes secrete gamma globulins, or antibodies). Muscular Tissue. Muscular tissue is composed of fibers (cells) that contract.