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.
The function of the mitochondria in a plant cell is to support the  function of the cell and the structure. The mitochondria usually  has a membrane which has folds that are â¦ stretched to provide a  wider surface area for cellular activities.1 person found this useful.he mitochondria provide energy for the cell. They are known as the powerhouse of the cell because they provide the location for the production of ATP (adenosine tri-phosphate).