BIOL 1117 Lecture Notes - Rectus Abdominis Muscle, Loose Connective Tissue, Pylorus

• School: Northeastern University
• Department: Biology
• Course: BIOL 1117
• Professor: Christopher Richardson

Document Summary

Move from place to place, movement of body parts and body contents in breathing, circulation, feeding and digestion, defecation, urination, and childbirth. Muscles also support communication: speech, writing and nonverbal communication: stability. Chemical energy becomes mechanical energy and then becomes heat: connective tissue of a muscle, endomysium thin sleeve of loose connective tissue surrounding each muscle fiber. The endomysium creates room for blood capillaries and nerve fibers to nourish and stimulate the muscle fiber. Its outer surface grades into the fascia above it while the inner surface sends projections between fascicles to form perimysium sheet of connective tissue that separates neighboring muscles or muscle groups from each other and the subcutaneous tissue. Span long distances but they have fewer muscle fibers than a fusiform muscle of the same mass and produce less force. Some are elongated straps such as the rectus abdominus: triangular muscles, pennate muscles fan-shaped, broad at origin and tapering to a narrower insertion.