What Is Respiratory Rate? Your respiratory rate is the number of breaths you take per minute. When you breathe in, your lungs fill with air and move oxygen into your bloodstream. When you breathe out, your lungs expel carbon dioxide from your...

Your blood carries oxygen to the cells in your tissues and organs. Knowing how well oxygenated your blood is can help you understand your overall health. Blood Oxygen Levels Your blood oxygen level represents the percentage of haemoglobin in your...