Large intestine (specifically colon)
The organ affected by bloating and gases is the stomach.
UC affects the colon, primarily.
The lung is one organ that is affected.
Affected by?
I think the first organ to be affected by alcohol is your liver.
That will vary from disease to disease and organ to organ.
Lung.
Your skin
kidneys
Laserations inside the digestive system,it stays localized in one organ unlike Crohms which causes complications from mouth to anus. Ulcerative Colitis is usually taken care of by removing the colin.
Spleen