The metabolic activity of any tissue is limited by its blood supply; the more active any organ, the more blood it needs and the more extensive its vascularization. The changes in metabolic activity ...
The circulatory system consists of one heart, five liters of blood, and approximately 96,000 kilometers of blood vessels, responsible for transporting nutrients and waste throughout the body. Water ...
People have long been fascinated with hearts—how they work, how they change and how they break. The Grinch’s heart grew three sizes. Sgt. Pepper had a band for lonely hearts. And the Doctor on the ...
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