As blood makes its way through the 60,000 miles [100,000 km] of our circulatory system, it comes into contact with nearly every tissue in our body, including the heart, kidneys, liver, and lungs ​ — vital organs that process and rely on blood.
وهذه جميعها اعضاء مهمة تعتمد على الدم ،‏ وتقوم في الوقت نفسه بدور اساسي في معالجته .‏