An apple is a round fruit that typically has a smooth skin and a central core containing seeds. It comes in various colors, including red, green, and yellow. Apples are grown on trees, specifically from the species Malus domestica, and are popular for their sweet or tart flavor. They are often eaten raw, but can also be cooked or used in recipes like pies and sauces. Apples are rich in vitamins, particularly vitamin C, and provide dietary fiber. They are commonly associated with health benefits, such as improving heart health and aiding digestion. The saying "an apple a day keeps the doctor away" reflects their reputation as a nutritious snack.