Blood vessels carry nutrients (like glucose) and oxygen to the muscle cells that need them. Blood vessels take away carbon dioxide and waste from muscle
cells

c.muti cella's eukaryotic organisms began to diversify

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.