Hormones of heart, kidney and gastrointestinal tract

Hormones of heart, kidney and gastrointestinal tract

In addition to endocrine glands, hormones are also secreted by some tissues which are not endocrine glands.

For example, the atrial wall of heart secretes a very important peptide honnone called atrial natriuretic factor (ANF) which decrease blood pressure.

When blood pressure is increased, ANF is secreted which causes dilation of blood vessels.

This reduces the blood pressure.

Juxta glomerular cells of kidney produces peptide hormone called erythropoietin which stimulates erythropoiesis. (Formation of RBC).

Endocrine cells present in different part of the gastro intestinal tract secrete four major peptide hormones namely gastrin, secretin, cholecystokinin (CCK) and gastric inhibitory peptide (mentioned in animal nutrition).