To add detail for the curious: Blood is hemoglobin, and circulates the body, delivering oxygen to where its needed. Whereas the "juice" from a piece of cooked

To add detail for the curious: Blood is hemoglobin, and circulates the body, delivering oxygen to where its needed. Whereas the "juice" from a piece of cooked meat is myoglobin, stores oxygen inside muscle cells until needed, and is responsible for the red color of meat in general.