The endocrine system is composed of organs positioned throughout the body in widely separated locations. Endocrinology is the study of the structure and functioning of the endocrine system.
The endocrine system is composed of organs positioned throughout the body in widely separated locations. Endocrinology is the study of the structure and functioning of the endocrine system.
Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.
Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.
It includes introduction on endocrine system and detail description of hypothalamus and pituitary gland with functions of various hormones and disorders.
This power point presentation deals with the various types of glands present in human body. We have discussed here about Major Endocrine Glands in human body, their structure, their location, the hormones they produce and the effect of those hormones. We have also discussed about disorders that may occur with abnormal hormonal secretions, Lastly we have discussed about the mechanisms in which the hormone works inside human body
The pituitary gland is a small, bean-shaped gland situated at the base of your brain, somewhat behind your nose and between your ears. Despite its small size, the gland influences nearly every part of your body. The hormones it produces help regulate important functions, such as growth, blood pressure and reproduction.
The physiological functions of hypothalamus related to both endocrine and au...Dr Ndayisaba Corneille
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http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
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2. Endocrine Glands:
Endocrine glands are ductless organs that secrete
special substances termed HORMONES.
These hormones are released into circulatory system
and transported to distant receptor organ.
Hormones are produced by parenchymal cells,which
can be found as single,aggregate or organized as
endocrine glands.
5. Location:
Situated at the base of skull.
Suspended below diencephalon,in the hypophyseal
fossa of sphenoid bone.
Connected to hypothalamus by pituitary stalk.
7. Anatomy of Pituitary Gland:
Anatomically pituitary gland is made up of following 3
parts……..
Adenohypophysis (anterior pituitary)
Neurohypophysis (posterior pituitary)
Intermediate lobe
8. Adenohypophysis:
Consists of endocrine cells, numerous blood vessels
& very few nerve fibers.
The pituitary stalk contains a special portal
system,organised in same manner as portal venous
system in liver,with two capillary networks following
each other.
9. Blood supply to
adenohypophysis:
Vessels from first capillary network convey blood to
anterior pituitary.
While second capillary system surrounds the hormone
producing cells.
10. Hormones of adenohypophysis:
Hormone Effect
Somatotropin Growth via secretion of IGF-I
Thyroid stimulatin hormone (TSH) Secretion of thyroid hormone
Adenocorticotopic Hormone (ACTH) Secretion of glucocorticoids and androgens
Prolactin (PRL) Production of milk
Gonadotropin:- Production and maturation of spermatozoa
Follicle stimulating hormone (FSH) and oocyte.
Luteinzing hormone (LH) Secretion of sex hormone
13. Anatomy of neurohypophysis:
It consists of a stalk which connects the pituitary
gland to tuber cinereum of hypothalamus and
distal,major part of neurohypophysis.
14. Mode of secretion:
Contains no hormone producing cells.
Instead the hormones are secreted by the neurons
which have their cell bodies into hypothalamus.
Because the posterior pituitary hormones are
produced in hypothalamus.
So it is not entirely accurate to call posterior as
endocrine gland,rather it acts as hormone storage
store.
15. Conti……..
Neurohypophysis stores and releases hormones
produced by the neurosecretory cells of supraoptic
and paraventricular nuclei of hypothalamus.
17. Hormones of posterior pituitary:
Hormone Effect
Oxytocin Elicit milk let down
Increase uterine
contractions
Antideuratic Hormone Reabsorption of water
in kidneys
19. Intermediate lobe:
The portion of adenohypophysis, in direct contact
with distal part of neurohypophysis is termed as
intermediate lobe.
Intermediate lobe is present between two major
parts of pituitary gland, which thing gives it its name.
During embryonic development intermediate lobe
develops from epithelial tissue.
20. Anatomy of intermediate lobe:
Intermediate lobe extends around neurohypophysis
and the anterior lobe is separated from the
intermediate lobe by the hypophyseal cleft which is
also known as cavum hypophysis.
21. Hormones of intermd. lobe:
The intermediate lobe of pituitary gland produces
melanocyte stimulating hormone.
Which regulates the skin colour.
This hormone regulates the skin colour only in lower
vertebrates but the function of this hormone is not
known in mammals and birds, although it is secreted.