The hormones secreted by islets of Langerhans are

• The Islets of Langerhans are the ductless glands present in the pancreas. They form the endocrine portion of the pancreas.
• The islets of Langerhans has different types of cells like α cells, β cells, and δ-cells the α cells surround the β cells
• Insulin is secreted by the β cells, while α cells secrete glucagon.
• Both insulin & glucagon are very important for sugar metabolism.
• Insulin is released into the bloodstream to lower down blood sugar levels and prevent hyperglycemia.
• Glucagon is released into the bloodstream to prevent blood sugar levels from dropping too low (hypoglycemia)
• The hormone somatostatin is secreted by the  δ-cells
• Thus, the hormones secreted by islets of Langerhans are Insulin, Glucagon, Somatostatin​

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