Conversation so far:
where does the spleen lie in the body
The spleen is located under the ribcage and above the stomach in the left upper quadrant of the abdomen.
what system is the spleen part of
The spleen is the largest organ in the lymphatic system.
what does the lymphatic system do
The primary function of the lymphatic system is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.

Question: what types of tissues is the organ made of
Self-contained rewrite: what types of tissues is the spleen made of