The Heix aspersa, commonly known as the garden snail, is a land snail, a terrestrial pulmonate gastropod mollusk belonging to the Helicidae family. This makes it a typical snail. It is native to the Mediterranean and Western Europe, and is often regarded as an agricultural pest.
It's Cardiovascular System (and that of most gastropods)
Garden snails have an open circulatory system, meaning their blood is pumped directly to the heart. A defining feature of the snail's cardiovascular system is the fact that it carries haemolymph instead of blood, which arises due to the lack of clear distinction between it's blood and intestinal fluid. The snail's heart consists of two chambers: the auricle and ventricle. The auricle receives haemolymph from the lung, while the ventricle pumps this haemolymph into the snail's aorta. After a short distance, the aorta splits into two main vessels that go to the visceral mass and the snail's head and foot, respectively. From there they divide into smaller vessels that distribute haemolymph to open sinuses throughout the snail's body, where it oxygenerates the tissues. The de-oxygenated then goes through a large sinus within the head and foot of the snail, which includes the snail's equivelant to a kidney, the nephridium. It then passes through the snail's gill and then back to the heart.