Infections of the gums and teeth can release bacteria into the blood system.

牙龈和牙齿的传染病会释放细菌进入血液系统。

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The idea was that changes to such proteins in brain cells affected by Alzheimer's might leach into the blood system.

他们设想，脑细胞中的这些蛋白在受老年性痴呆影响后发生的变化也会体现在血液中。

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Peter Dodds of the University of Vermont draws a particular analogy between the blood system and a suburban railway network.

佛蒙特大学的彼得·多兹将血液循环系统和城郊铁路网做了一个很特别的类比。

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They can even be deadly. Infections of the gums and teeth can release bacteria into the blood system.

VOA: special.2009.03.11

Endocrine are signals that get carried through the blood system.

内分泌系统的信号通过血液来传递

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Here, what's different between autocrine and paracrine is that there's some distance between the cell that produces the signal and the cell that receives the signal, but it's not too great a distance because the blood system doesn't have to be involved.

自分泌和旁分泌的区别在于,旁分泌中,产生信号的细胞和接收信号的细胞,之间存在着一定的距离,但这个距离并不远,因为血液系统并不参与

耶鲁公开课 - 生物医学工程探索课程节选

Behe contends that evolution cannot fully explain the biological complexities of life such as the immune system and blood clotting suggesting the work of an intelligent force.

MSN: Intelligent design vs. stack of science books

Topping up the supply of healing fluid might be done by mimicking another biological system the network of blood capillaries that supplies living tissues with the stuff they need to thrive.

ECONOMIST: Monitor

This approach has the advantage that the tissue has a functioning system of blood vessels to deliver nutrients, so it should be possible to grow tissue cultures more than a millimetre thick the current limit.

ECONOMIST: Monitor