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Basic Tissue Types #3 and #4 Muscle and Nerve Danny Quirk – Beautiful Decay Japan – 2006 by the same people who brought us The Ring Muscle Tissue Skeletal Muscle • Principal function is to move the skeleton • Referred to as striated due to the alternating light and dark bands of protein • Primarily voluntary • Some is controlled unconsciously (for example the diaphragm) Skeletal or Striated Muscle Cardiac Muscle • Found only in the heart • Is striated like skeletal muscle, but acts in a voluntary function • Cannot be consciously controlled • Has an autorhymicity not found in most other muscles Intercalated Discs Cardiac Muscle Smooth Muscle • Located in the walls of hollow internal structures such as blood vessels and airways • Attached to hair follicles in the skin • Lacks striations • Acts involuntarily • Has a degree of autorhymicity, particularly when it comes to propelling food through the GI tract Smooth Muscle Tendons and Ligaments Tendons and Ligaments • Tendons connect muscle to bone • Ligaments connect bone to bone • Both are composed of dense regular connective tissue AKA – the Gastrocemius tendon or the Calcaneal tendon Calcaneous Supra patellar tendon Quadriceps tendon Infra patellar tendon Nerve Tissue • Nerve tissue consists of two types of cells: • Neurons that carry out most of the unique functions of the nervous system such as sensing, thinking, regulating glandular secretions and controlling muscle activity • Neuroglia cells which support, nourish and protect neurons Typical nerve cell showing the soma, Dendrites and axon Neuroglia Axon Nerve cell body or Soma