👉 The term "mesolimnion" refers to a type of organ in the human body. Mesolimnial organs are found in the lower part of the abdomen, specifically in the meso- and limbic regions, which are involved in many complex functions such as emotional regulation, memory consolidation, and decision-making. These organs include the pituitary gland, pineal gland, adrenal glands, thyroids, and thyroid tissue.