Circadian Clocks

Circadian Clock System
Circadian Timing System
Circadian Clock
Circadian Clock Systems
Circadian Timing Systems
Clock System, Circadian
Clock Systems, Circadian
Clock, Circadian
Clocks, Circadian
System, Circadian Clock
System, Circadian Timing
Systems, Circadian Clock
Systems, Circadian Timing
Timing System, Circadian
Timing Systems, Circadian

Biological mechanism that controls CIRCADIAN RHYTHM. Circadian clocks exist in the simplest form in cyanobacteria and as more complex systems in fungi, plants, and animals. In humans the system includes photoresponsive RETINAL GANGLION CELLS and the SUPRACHIASMATIC NUCLEUS that acts as the central oscillator.
2011