What are endocrine glands? Name the secretions of these glands. How do these secretions reach the target organs?

Endocrine glands- These are the glands which help in chemical coordination. Endocrine glands are a group of cells which secrete certain chemicals and they secrete them directly into the blood as endocrine glands lack ducts.

The chemicals secreted from endocrine glands are called hormones.

The following table depicts different endocrine glands and their secretions in the human body:

All the endocrine glands are ductless and release their secretions into the blood. So, these secretions reach their target organs with the help of blood only.

As blood flows into complete body and hormones being secreted into it flow with it but what happens is each hormone has an affinity with its target organs. Target organs of all hormones have some specific receptors associated with them, so due to this specific receptors hormone only reach and react with their target organs and don’t reach to some other organ.