True I think but not sure
Explanation:
Cellular respiration is when cells take oxygen and food to make energy, and also water and carbon dioxide. For the organism to get oxygen, they breath in the air from the outside. The oxygen travels through the respiratory pathway to get to cells.
A malignant tumor has begun to allow cancers cells to enter the brain. Maligant tumors divide into primary tumors which start with the brain and secondary tumors which scatter from somewhere else which is called brain metastasis tumors.
There are symptoms which produce by brain tumors. For example, a problem with vision, vomiting, mental changes and headache. The important problem may include having difficulty in walking. The cause of brain tumor is unknown but the most risk factor is that it may be inherited neurofibromatosis, ionizing radiation and vinyl chloride.
Medulloblastoma is the type of malignant tumor in children. The medical examination which is computed by tomography can diagnose it. Treatment of a malignant tumor is chemotherapy, radiation therapy and surgery.
