The spleen has two surfaces - diaphragmatic surface and visceral surface.

Diaphragmatic surface

The diaphragmatic surface is the posterolateral surface of the spleen. As the name suggests, it faces the diaphragm (dome of the left hemidiaphragm). It appears smooth and is slightly convex, adjusting to the concavity of the diaphragm. This surface also has impressions left by the ribs nine to eleven.

Visceral surface

The visceral surface of the spleen is directed medially and connects with other internal organs in the abdominal cavity, such as the stomach, colon, pancreas, and left kidney. Therefore, this surface appears irregular and is concave. It has several impressions left by the mentioned internal organs. Additionally, the central aspect of the visceral surface contains the hilum of the spleen.

Note: The hilum of the spleen is a site where nerves, blood and lymphatic vessels leave and enter the spleen. It is found at the central aspect of the visceral surface of the spleen.