Hypophyseal portal system

Definition

The hypophyseal portal system is a network of blood vessels that connects the hypothalamus to the anterior pituitary gland. It allows for the direct transport of hormones from the hypothalamus to the anterior pituitary, facilitating rapid and efficient hormonal communication.

5 Must Know Facts For Your Next Test

1. The hypophyseal portal system consists of two capillary beds connected by portal veins.
2. It enables hypothalamic hormones to reach the anterior pituitary without entering systemic circulation.
3. This system is crucial for regulating hormone secretion from the anterior pituitary gland.
4. Hypothalamic releasing and inhibiting hormones travel through this system to control pituitary function.
5. Disruption in the hypophyseal portal system can lead to endocrine disorders due to improper hormone regulation.

Review Questions

• What is the primary function of the hypophyseal portal system?
• How does the hypophyseal portal system facilitate communication between the hypothalamus and anterior pituitary?
• Why is it important that hormones travel directly from the hypothalamus to the anterior pituitary?

Related terms

Hypothalamus: A brain region that controls many bodily functions, including hormone release via its connection with the pituitary gland.

Anterior Pituitary Gland: An endocrine gland that secretes various hormones under the regulation of hypothalamic signals delivered through the hypophyseal portal system.

Portal Veins: Blood vessels that directly connect two capillary beds, such as those in the hypophyseal portal system connecting hypothalamus and anterior pituitary.