Final answer:
The left pole of the spleen angles sharply at the left colic flexure, immediately inferior to the spleen, where the transverse colon transitions to the descending colon.
Step-by-step explanation:
The left pole of the spleen extends to the left side of the abdomen, angling sharply immediately inferior to itself, at the left colic flexure (splenic flexure). This is where the colon bends as it transitions from the transverse to the descending colon. The spleen is nestled against the lateral border of the stomach and is attached to it by the gastrosplenic ligament. It is a significant secondary lymphoid organ, involved in both filtering blood and mounting immune responses to blood-borne pathogens.