Image: Seals are consumers. An ecosystem is made up of animals, plants and bacteria as well as the physical and chemical environment they live in. The living parts of an ecosystem are called factors while the environmental factors that they interact with are called abiotic factors.
Atrial natriuretic peptide (ANP), also called atrial natriuretic factor (ANF), atrial natriuretic hormone (ANH), cardionatrine, cardiodilatin (CDD), or atriopeptin, is a powerful vasodilator, and a protein (polypeptide) hormone secreted by heart muscle cells.
1. Eur Heart J. 1987 May;8 Suppl B:99-109. Ruskoaho H, Lang RE, Toth M, Ganten D, Unger T. Mammalian atrial cardiocytes synthesize and secrete a hormone called atrial natriuretic peptide (ANP), which causes natriuresis, diuresis and inhibition of smooth muscle contraction, aldosterone and renin release.