What type of secretion occurs without the use of ducts?

Endocrine secretion refers to the process where hormones are released directly into the bloodstream without the involvement of ducts. This method of secretion allows hormones produced by endocrine glands, such as the thyroid gland or the adrenal glands, to travel throughout the body and reach their target organs or tissues, facilitating systemic regulatory functions.

In contrast, exocrine secretion involves the release of substances through ducts to the exterior of an organ or onto a surface, such as sweat or saliva. Merocrine and apocrine secretions are specific types of exocrine secretion that describe different mechanisms by which substances are released from glandular cells.

Understanding the distinctions between these types of secretions highlights the unique role of endocrine glands in maintaining internal physiological balance and communication throughout the body.