Endocrine System Overview

THEendocrine system

What is the endocrine system?

This system is a compex communication network of ductless glands that secrete hormones

+ what are hormones?

Endocrine system regulation

Negative Feedback Mechanism

Primary vs. Secondary

As hormone levels

gland is stimulated to secrete

• This tells us WHICH organ is causing the issue

As hormone levels

gland suppresses secretion

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THEpineal gland

Info

-Your body's biological clock-Pineal gland is a cone shaped gland located close to the thamalus in the brain

THEpituitary gland

Pituitary Gland

Pituitary Gland

Located in sphenoid bone of the skull

• Attached to the hypothalamus by infundibular stalk
• 10%-20% of all intracranial tumors are here
• Has two lobes

1. Anterior2. Posterior

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Pituitary Gland Hormones

The pituitary gland works to release many types of hormones

These hormones are released from the Anterior or Posterior part of the gland.

Anterior Pituitary Gland Hormones

ACTH

Prolactin

GH

FSH

TSH

How can I remember these?

LH

Posterior Pituitary Gland Hormones

Oxytocin

How can I remember these?

ADH

What are hormones?

• Chemical transmitters released by glands into the blood
• Act on distant organs to regulate growth, metabolism, & sexual development and function

Click here to find out what hormones play a role in

Pineal Gland

It's believed to secrete melatonin What does melatonin affect? 1. Reproductive cycle 2. Plays a role in sleep/wake cycle

• Melatonin levels are directly linked to the amount of daylight someone receives
• Eleavated melatonin = seasonal affective disorder

ProlactinWorks on the mammary glands to stimulate milk production.