By respiratory system we usually mean the passages that transport incoming air to the lungs and to the microscopic air sacs called alveoli where gases are exchanged. The term respiration refers to the whole chain of processes from the inhalation of air to the use of oxygen in the cells. Index. Reference.
Phagocytes are the white blood cells that protect the body by eating (phagocytosing) dirt, bacteria and dead or dying cells. They are important for fighting infections. They are also important for becoming immune. Phagocytes are important in all animals and are very complex in vertebrates.
Best Answer: Phagocytosis is the engulfing of extracellular particles into the cell, which then become surrounded by a vesicle. It is important in some cells, such as unicellular organisms, as a mechanism of intracellular digestion.or instance, macrophages are an important phagocytic white blood cell that helps to defend the body by engulfing foreign pathogens, such as bacteria. By doing this, macrophages are capable of initiating an immune response where antibodies are produced to help defend the body against the pathogen.