Papillary structures are present in several tissues and organs:
Skin: The dermal papillae in the skin are essential for the attachment of the epidermis to the dermis and play a role in sensation. Kidneys: In the kidneys, the renal papillae are involved in the drainage of urine from the nephrons into the urinary tract. Thyroid Gland: Papillary structures can also be seen in the thyroid gland, especially in cases of papillary thyroid carcinoma. Placenta: The chorionic villi in the placenta are another example, which facilitate the exchange of nutrients and gases between the mother and the fetus.
