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4. Shedding light on the clock

4. Shedding light on the clock  

Russell G. Foster and Leon Kreitzman

in Circadian Rhythms: A Very Short Introduction

Print Publication Year: 
Mar 2017
Published Online: 
Mar 2017
eISBN: 
9780191787164
DOI: 
10.1093/actrade/9780198717683.003.0004
Item type: 
chapter
ISBN: 
9780198717683
Most circadian clocks make use of a sun-based mechanism as the primary entraining signal to lock the internal day to the astronomical day. For nearly four billion years, dawn and dusk has ... More
5. Blood pressure and blood flow

5. Blood pressure and blood flow  

Chris Cooper

in Blood: A Very Short Introduction

Print Publication Year: 
Sep 2016
Published Online: 
Sep 2016
eISBN: 
9780191785467
DOI: 
10.1093/actrade/9780199581450.003.0005
Item type: 
chapter
ISBN: 
9780199581450
The heart is the organ that pumps blood around the body. If the heart stops functioning, blood does not flow. The driving force for this flow is the pressure difference between the arterial ... More

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