ANP 1106 Lecture Notes - Lecture 5: Biceps, Loose Connective Tissue, Extensor Digitorum Muscle

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jackie Carnegie

Document Summary

Muscles are composed of several layers of connective tissue sheaths, surrounding muscle fibres. The endomysium is a fine layer of areolar connective tissue that surrounds each muscle fibre. The perimysium is a layer of connective tissue, surrounding each fascicle. The epimysium is a layer of dense connective tissue, surrounding the entire muscle. The epimysium may extend and blend with deep fascia, which are responsible for binding muscles into functional groups. Muscles are attached to bones in at least two places, and they generally span joints. The origin of the muscle is found on the immovable or less movable bone, while the insertion of the muscle is found on the movable bone. Muscle origin and insertions may be direct or indirect. Direct muscle attachments involve the fusion of the epimysium with the periosteum of a bone or the perichondrium of a cartilage.