Thymosin
Thymosin is a hormone secreted by the thymus (an endocrine gland in the human body).
Endocrine glands differ from "exocrine" glands in that exocrine glands have ducts (so may be referred to as "ducted") whereas endocrine glands do not have ducts (and so may be referred to as "ductless").
The roles of the hormone thymosin include activating the immune system by activating the T-Cells (T-Killer Cells, T-Helper Cells andT-Memory Cells) which are types of lymphocytes in the blood.
See also: What is a Hormone ?
For further general information including the locations of the endocrine glands, see the Endocrine Glands of the Human Body.
More about the Endocrine System
- Introduction to the Endocrine System
- What is a hormone ?
- Water Soluble Hormones vs Fat Soluble Hormones
- Triggers for Hormone Release
- Hormone Regulation Feedback Mechanism
- Major Glands of the Endocrine System
- The Pituitary Gland
- The Adrenal Glands
- Non-endocrine tissues that release hormones
- Conditions of the Endocrine System
- Diabetes
