Papula

In this article we are going to address the topic of Papula, which has generated great interest today. Papula is a topic that impacts people of all ages and backgrounds, since its relevance transcends cultural and geographical barriers. It is important to understand the importance of Papula in our current society and how it can influence various aspects of our lives. Throughout this article, we will explore the different aspects and perspectives related to Papula, with the aim of offering a complete and objective analysis of this very relevant topic.

For the skin condition, see papule.

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Papulae (sing. papula; also occasionally papulla, papullae), also known as dermal branchiae or skin gills, are projections of the coelom of Asteroidea that serve in respiration and waste removal. Papulae are soft, covered externally with the epidermis, and lined internally with peritoneum. They extend through the mesodermal ossicles and are protected from microscopic larvae by pedicellariae. In a living specimen, the dermal gills can be extended or withdraw.

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