The spleen has two surfaces - diaphragmatic and visceral.

Diaphragmatic surface

The diaphragmatic surface (facies diaphragmatica) 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 (diaphragma). This surface also has impressions left by the ribs nine to eleven (costae IX - XI).

Visceral surface

The visceral surface (facies visceralis) of the spleen is directed medially and connects with other internal organs in the abdominal cavity (cavitas abdominis), such as the stomach (gaster), colon (colon), pancreas (pancreas), and left kidney (ren sinister). 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 (hilum splenis).

Note: The hilum of the spleen (hilum splenis) 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.