Oranges have many health benefits.

They are rich in vitamin C and A,flavonoids,antioxidants,calcium.magnesium,pottasium,dietry fibre etc.

1.Relieves Constipation; The dietry fiber in orange helpsin stimulating digestive juices and releives constipation
2.Regulates High Blood Pressure ;Hesperidin ,a flavonoid in oranges helps to regulates high blood pressure.Magnesium in oranges helps to maintain the blood pressure.
3; Prevents Cancer ;The high amount of vitamin C protects the cell damages by free radicals.Luminoid,a compound in oranges helps to prevent cancers like oral,skin,lung,breast and colon.
4.Protects against Heart Diseases ;The high amount of vitamin C and flavonoids protects against heart diseases .
5.Fights against Viral Infections; Studies show that the abaundance of poly phenols protects against viral infections.
6 .Purifies Blood ; The iron and vitamin B6 in oranges help in the prodution of hemoglobin and increase the oxygen carrying capacity..They also purifie ...more

They are many benefits of eating oranges:
1)They are rich in vitamin C.
2)They help prevent cancer and the following diseases:
1)Asthma
2)Bronchitis
3)Tuberculosis
4)Pneumonia
5 )Rheumatism
3)Prevent kidney stone
4)Helps lower cholesterol ...more

I think Jakir Hussain has given the complete answer, I wish to add only one thing it helps the farmers who grow them !

Lot off

Oranges contain high vitamin "C" which protect you from any kind of infection and build up resistance to fight any disease .

Lot of vitamin C in oranges which protects us from many dieseases

We get vitamin C.

You will get vitamin C

Sour fruits are better than sweet fruits.... so daily eat 300 gms of black grapes with seeds..... or take daily juice of three lemons in one glass of water.... or eat 40 gms of radish vegetable uncooked....kumrao99@yahoo.co.in

U get vitamin c n lots of energy n resistance power