Understand why and how the light microscope and electron microscope are used in biologyA cell is the smallest unit of a living thing. Thus, cells are the basic building blocks of all organisms.Several cells of one kind that interconnect with each other and perform a shared function form tissues, several tissues combine to form an organ (your stomach, heart, or brain), and several organs make up an organ system (such as the digestive system, circulatory system, or nervous system).
The plasma membrane, which is also called the cell membrane, has many functions, but the most basic one is to define the borders of the cell and keep the cell functional. The plasma membrane is selectively permeable. This means that the membrane allows some materials to freely enter or leave the cell, while other materials cannot move freely, but require the use of a specialized structure, and occasionally, even energy investment for crossing.
Madagascar, a country on the east coast of Africa, is home to an incredible array of wildlife: a whopping 250,000 species of animals reside there, 70% of which are endemic (and many more endangered). While some Malagasy creatures may have been immortalized by the Disney movie, the true range of animals in Madagascar is far more wonderful than any computer animation can produce.