Pattern: Hormones of Heart, Kidney and Gastrointestinal Tract
Description: Some non-endocrine tissues are also involved in secretion of hormones.
Heart: Atrial natriuretic factor (ANF) also called atrial natriuretic peptide (ANP), is a peptide hormone which is secreted by cardiac cells of the body.
Kidney: Erythropoietin is secreted by the juxtaglomerular cells of the kidney. Its function is to trigger the RBC production in the bone marrow, especially when the oxygen level in the blood reduces.
Gastrointestinal Tract: Hormones secreted by endocrine cells of the gastrointestinal tract (GIT) are Gastrin, secretin, cholecystokinin (CCK) and gastric inhibitory peptide (GIP).