In spite of possessing all these highly desirable features, hydraulic systems also have certain drawbacks, some of which are: â¢ Handling of hydraulic oils which can be quite messy. It is also very difficult to completely eliminate leakage in a hydraulic system. â¢ Hydraulic lines can burst causing serious human injuries. â¢ Most hydraulic fluids have a tendency to catch fire in the event of leakage, especially in hot regions. It therefore becomes important for each application to be studied thoroughly, before selecting a hydraulic system for it.
Cells are an organismâs basic unit of structure and function. The cell is the lowest level of structure that is capable of performing all the activities of life. For example, the ability of cells to divide is the basis of all reproduction and the basis of growth and repair of multicellular organisms.
Known as the cellâs âcommand center,â the nucleus is a large organelle that stores the cellâs DNA (deoxyribonucleic acid). The nucleus controls all of the cellâs activities, such as growth and metabolism, using the DNAâs genetic information. Within the nucleus is a smaller structure called the nucleolus, which houses the RNA (ribonucleic acid). RNA helps convey the DNAâs orders to the rest of the cell and serves as a template for protein synthesis.