Umbilical hernia repair. Umbilical hernia repair is surgery to repair an umbilical hernia. An umbilical hernia is a sac (pouch) formed from the inner lining of your belly (abdominal cavity) that pushes through a hole in the abdominal wall at the belly button. You will probably receive general anesthesia (asleep and pain-free) for this surgery.
Give a plant too much sun and it will look bleached, pale, or event burned; too few hours and it will have thin leaves and elongated shoots. Some plants require about a half day of light, while others need up to 18 hours of light each day; the latter include vegetables, which will get pale without sufficient light.
Photosynthesis begins with light absorption. Chlorophyll absorbs all colors of light except for green -- plants appear green because chlorophyll reflects back the green wavelengths that strike it. This light energizes electrons inside the chlorophyll, giving the plant energy to power sugar synthesis.