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.
The cell is the smallest organism that is living and is capable of growth, development, respiration, excretion and reproduction. Almost all organisms, except protozoans are multicellular. The cells combine together to make tissues, which make up organs. Cells, tissues and organs are responsible for performing the basic functions of a living organism which keeps the organism alive. Tissues are an organization level between cells and organs.