The axial gland complex.
D000818:Animals; D001692:Biological Transport; D001826:Body Fluids / Q000032:analysis; D002241:Carbohydrates / Q000032:analysis; D002320:Cardiovascular Physiological Phenomena; D002319:Cardiovascular System / Q000033:anatomy & histology; D004447:Echinodermata / Q000502:physiology*; D005088:Exocrine Glands / Q000502:physiology; D005769:Gastrointestinal Motility; D009584:Nitrogen / Q000032:analysis
D002241:Carbohydrates; D009584:Nitrogen