Tag
#circulation
2 articles
Medicine
The Heart: Two Pumps in One
How the heart works as two pumps in one — four chambers, one-way valves, the lub-dub of the cardiac cycle, and the figure-eight of double circulation that keeps oxygen-rich and oxygen-poor blood apart.
10 minAug 18, 2026
Medicine
Blood Pressure and Circulation
Why a blood-pressure reading has two numbers, how elastic arteries smooth a pulsing heart into steady flow, and why a fourth-power law makes tiny vessels the body's master control valves.
9 minJul 13, 2026