Introduction to psychology

  • 42 views
Uploaded on

Endocrine System

Endocrine System

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
42
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
2
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Introduction to Psychology Endocrine System
  • 2. Defination  The Endocrine System is made of glands and tissues that secrete hormones.  The Endocrine System is a set of glands that regulates the activities of certain organs by releasing their chemical products into blood stream.  These glands have no ducts or openings
  • 3.  Controls many body functions  Exerts control by releasing special chemical substances into the blood called hormones.  Hormones effects other endocrine glands or body systems.
  • 4. Glands of Endocrine System Following glands are included in endocrine system :  Pituitary Gland  Thyroid Gland  Parathyroid Gland  Thymus Gland  Adrenal Gland  Pancreas Gland  Pineal Gland  Gonad Gland
  • 5. Pituitary Gland  Located at the base of brain and connected to the hypothalamus  Divided into interior and posterior lobes  Known as the master gland because of its major influence in body’s activities
  • 6. Hormones of the Pituitary Gland  Divided into two lobes  Anterior pituitary lobe is larger and produces seven hormones.  Posterior pituitary lobe is smaller and consist primarily of nerve fibers and neuroglial cells.
  • 7. Anterior pituitary  The anterior pituitary synthesizes and secretes the following important hormones under the influence of hypothalamus ◦ Adrenocorticotropic hormone (ACTH) ◦ Thyrotropin or thyroid stimulating hormone ◦ Prolactin hormone ◦ Growth hormone ◦ Gonadotropin hormone
  • 8. Posterior pituitary  Posterior pituitary releases the following hormones ◦ Oxytocin hormone ◦ Antidiuretic hormone (ADH)
  • 9. Thyroid and Parathyroid Glands  Thyroid Glands Locted in the anterior part of neck It is butterfly shape organ and is composed of two con-like lobes or wings Secretes three hormones  Thyroxine  Triiodthyronine  Calcitonin
  • 10. Thyroid and Parathyroid Glands  Parathyroid Glands  They are small endocrine glands in the neck that produce parathyroid hormone.  Humans have four parathyroid glands, which are located behind the thyroid gland.  Parathyroid glands control the amount of calcium in the blood and within the bones  It serves a completely different role than the thyroid gland.
  • 11. Thymus Gland  The thymus gland is both an endocrine gland and lymphatic organ.  The thymus secretes a large number of hormones  It is composed of two lobes and is located in front of the heart and behind the sternum.  Thymus is specialized organ in the immune system.
  • 12. Structure of thymus  Structure of the thymus can be divided into two parts  Medulla  Peripheral cortex  The cortex and medulla play different roles in the development ofT-cells.
  • 13. Adrenal Glands  Adrenal glands are situated just above the kidneys one on each side.  These are triangular shaped glands.  They are chiefly responsible for releasing hormones which are extremely important to neural functioning and to the ability of the body to cope with stress.
  • 14. Adrenal Glands  Two adrenal glands located at the top of each kidney; each has two parts Cortex – secretes 3 groups corticoids • Mineralocorticoids • Glucocorticoids • Sex hormones Medulla – secretes • Epinephrine / adrenaline • Nor – epinephrine / nor adrenaline
  • 15. Pancreas Gland  Located behind stomach  Pancreas is a dual function gland i.e. endocrine or exocrine gland  Function as : • Exocrine gland oSecretes pancreatic juices into small intestine to become digestive juices • Endocrine gland oProduces insulin and diabetes.
  • 16. Pineal Gland  Attached to the third ventricle of the brain  Produces the hormone melatonin • Amount of light effects the amount of melatonin secreted • Causes body temprature to drop
  • 17. Gonad Gland  Gonads – sex organs Ovaries – female sex organ • Ova • Estrogen and progesterone Testes – male sex organ • Sperm • testosterone