Why do capillaries need to be thin walled ?

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

Differences between compact bone and cartilage

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?