What Are Endocrine Glands?

An endocrine gland is a gland without a secretory tube. The substances (called hormones) they secrete go directly into the surrounding blood vessels and lymphatic vessels, where the blood and lymph fluid transport the hormones throughout the body. There are many endocrine glands scattered throughout the body. Some endocrine glands form a single organ, such as the pituitary, thyroid, thymus, pineal gland, and adrenal glands. Other endocrine glands are found in other organs, such as pancreatic islets in the pancreas, corpus luteum in the ovary, and interstitial cells in the testis. Each hormone secreted by the endocrine glands plays a very complex and important regulatory role in the growth and development, functional activities, and metabolism of various organs in the body.

The human endocrine glands are pituitary,

The pituitary gland hangs from the bottom of the brain, so it is also called the pituitary gland or pituitary gland. It is oval in shape and the size of a pea.

Endocrine cells in the gastrointestinal mucosa can secrete gastrin, promote

Exocrine glands include salivary glands, sweat glands, sebaceous glands, liver, pancreas, etc. (The pancreas is divided into endocrine and exocrine parts, most of the pancreas belong to the exocrine part, but the islets belong to the endocrine part). Endocrine glands and exocrine glands Exocrine glands have excretory tubes, called gland ducts, whose secretions are transported through the gland ducts to the corresponding tissues or organs to exert their regulatory role (generally excretion) ^[1] .