Answer:
flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly, instead using a backlight or reflector to produce images in color or monochrome.
Explanation:
Pretty sure it would be the nerves attatched to the heart valve
Which one do you want answered
Blood is a specialized connective tissue. It's extracellular matrix is blood plasma which transports dissolved nutrients,hormones,and carbon dioxide in the form of bicarbonate
Neither matter or energy is created or destroyed, it is simply reused.