A stroke occurs when a blood clot blocks a blood vessel or artery, or when a blood vessel breaks and interrupts blood flow to an and bleeding occurs into an area of the brain. Every stroke is different.
ETA Chlorophyll works on the Liver and probably works a little. No it really doesn't, you are not a plant. Tea will oxygenate the blood. No it won't Also don't do as someone else said and drink liquid oxygen, that's really not a good idea.
Here's how that works. Red blood cells carry oxygen from the lungs to the rest of the body, using an iron-containing protein called hemoglobin. When a person becomes anemic, the body tries to compensate in a number of ways. The heart rate goes up in an attempt to get more blood, and hence more oxygen to the tissues.