part of part of has part has part extracellular matrix secreting cell connective tissue cell membranous layer muscle organ aponeurosis http://upload.wikimedia.org/wikipedia/commons/e/e6/Aponeurosis.png aponeurotic AEO:0000092 Aponeuroses are layers of flat broad tendons. They have a shiny, whitish-silvery color, and are histologically similar to tendons, but are very sparingly supplied with blood vessels and nerves. When dissected, aponeuroses are papery, and peel off by sections. The primary regions with thick aponeurosis is in the ventral abdominal region, the dorsal lumbar region, and in the palmar region. Their primary function is to join muscles and the body parts the muscles act upon[Wikipedia:Aponeurosis]. SCTID:331712004 UBERON:0006614 MESH:D000070606 EHDAA2:0003092 aponeuroses Wikipedia:Aponeurosis UMLS:C0225205 A sheet of extracellular matrix. ZFA:0005652 NCIT:C32133 FMA:9722 in ZFA, aponeuroses are subtypes of tendons, but this is inconsistent with tendons being muscle-bone connections