August Krogh

The circulatory system of man and the vertebrate animals can be considered as made up of a small number of organs or subordinate systems, which are easy to recognize anatomically, and the functions of which are on the whole quite distinct.

Danish Scientist

Used often in health and medicine to describe blood flow or heart-related functions.

Medical Context

Frequently used to describe the entire blood delivery system in the body.

Describes Systems

While typically about blood, it can refer to any system moving substances around the body.

Not Just Blood

More common in scientific or technical language, less in everyday conversation.

Technical Usage

Widens beyond blood to any fluid's movement in a system, natural or artificial.

Fluid Circulation

Can apply to mechanical systems too, like heating or cooling in buildings.

Mechanical Systems

 Have you ever wondered what happens to a painkiller, like ibuprofen, after you swallow it? Medicine that slides down your throat can help treat a headache, a sore back, or a throbbing sprained ankle. But how does it get where it needs to go in the first place? The answer is that it hitches a ride in your circulatory blood stream,

How does your body...

 As I said, the existing treatment requires the heart-lung bypass machine, and it requires a total body cooling. We don't need any of that. We work on a beating heart. He opens you up, he accesses the aorta while your heart is beating, all at the right temperature. No breaking into your circulatory system.

Tal Golesworthy: How I...

 it travels through the circulatory system and gets taken up by its target— whether that's a protein in the brain, cancer cells, or otherwise. Within a few minutes, a significant amount of the tracer has found its way to the target area and the rest has cleared from circulation.

Using radioactive drugs...

 all of these scalings and all of these constraints follow, including the description of the forest, the description of your circulatory system, the description within cells. One of the things I did not stress in that introduction was that, systematically, the pace of life

Geoffrey West: The...

 with all its organs and circulatory systems, like at school. And suddenly you think of architecture no longer as built substance, but as an organism, as a life form. And as you start to dissect this organism, you can identify a series of primary technical clusters --

Why great architecture...

 and the Sun is our beating heart. But the deep subsurface is like a circulatory system that's completely disconnected from the Sun. It's instead being driven by long, slow geological rhythms. There's currently no theoretical limit on the lifespan of one single cell.

This deep-sea mystery is...

 Informed by his poor understanding of the circulatory system, Galen was a strong proponent of these treatments, despite their sometimes lethal consequences. Unfortunately, Galen’s ego drove him to believe that all his discoveries were of the utmost importance.

Ancient Rome’s most...

 and other trash into the sea. Millions of tons of discarded fishing nets, gear that continues to kill. We're clogging the ocean, poisoning the planet's circulatory system, and we're taking out hundreds of millions of tons of wildlife, all carbon-based units.

Sylvia Earle: How to...

 have been protected by their blood. If you've ever had an injection, that probably includes you. How did horseshoe crabs end up with such special blood? Like other invertebrates, the horseshoe crab has an open circulatory system.

Why do we harvest...

 dangerous spider in the world without medical intervention she could die within the hour male funnel-web bytes deliver a powerful venom known as a Trachsel toxin the toxins reached the circulatory

Circulatory