👉 Siphuncular is a term used in medicine to describe an abnormality of the blood vessels of the lungs. It is characterized by the presence of multiple, small or large blood vessels that are lined with rough, irregularly shaped cells called epithelial cells. These cells can be arranged in various patterns, including pseudopodia and microvilli, which help in the transport of oxygenated blood to the alveoli (small air sacs) within the lungs. Siphuncular is