Bones of the skull - side view Bones of the rib cage together with the backbone which has 26 vertebrae enclose and protect internal organs, assist breathing and support the skull as well as upper extremities. On the picture we see only 7 carpals because os pisiformes cannot be seen from above. The muscle cell is very elongated cell which contains myofibrils - bundles containing actin and myosin filaments. These filaments slide against each other and so the muscle contracts. Structure of the striped muscle Stripes are typical for the striped muscle tissue.
Muscle cells contain several nuclei which lie on the periphery of the cell.
Striped muscle, long.section Stripes are typical for the striped muscle tissue. Muscle cells contain several nuclei which lie on the periphery of the cell. Striped muscle, cross section Heart muscle cells show stripes like the ordinary striped muscle cells, but the heart muscle cells are shorter. The junctions between heart cells show intercalated discs. They also form bridges to other heart muscle cells.