4. Endocrine Glands
•Endocrine system- Ductless glands
that synthesize and secrete
hormones
•Endocrine system- A hormone is
an organic substance needed by the
body in minute quantities telicity a
specific physiological response
BACK
5. •Endocrine system-
Hormone are produced by
one part of the body that
have an effect on specific
target cells located in
different parts of the body.
6. Hypothalamus
•A small gland about 1.0 cm in
diameter located at the base of the
brain.
• Intimate associated with the
pituitary gland.
• Secretes releasing hormones that
travel via a portal system and
stimulate the anterior pituitary.
8. Thyroid Gland
•Composed of two lobes, on each
side of the trachea connected by
an isthmus.
• Secrete thyroxin that regulate
growth and development.
• Enlargement of this gland result
in a condition known as goiter.
10. Parathyroid Gland
• Small glandular bodies
located on the dorsal surface
of the thyroids
• Secrete parathermones
(PTH) that maintains the
ration of calcium and
phosphorus in the body
12. Thymus Gland
•Located between the upper part
of the sternum and the pericardium
• A temporary organ which reaches
greatest development at age 14 to
16
• Secrete thyroxin that controls
metabolic rate and involved in the
formation of WBC
14. Adrenal cortex
•Secretes cortical and
aldosterone that causes
gluconeogenesis and sodium
retention and potassium
excretion in the kidneys
respectively.
16. Adrenal Medulla
•Two small masses located
above the kidneys.
•Secrete epinephrine and nor
epinephrine.
•Promotes "flight or fight”
reaction during emergency.
18. BACK
Major endocrine glands and their hormones:
GLAND Hormones Major function Disorder from Disorder from
too much too little
secretion secretion
Hypothalamus Releasing Stimulates Overactive Underactive
hormones anterior pituitary anterior pituitary anterior pituitary
Anterior pituitary Thyroid Stimulates Overactive Underactive
stimulating(TSH) thyroid thyroid thyroid
Anterior pituitary Adrenal Stimulates
Overactive Underactive
corticotrophin(A adrenal cortex
adrenal cortex adrenal cortex
CTH)
Anterior pituitary Follicle Regulates egg
Overactive Underactive
stimulating(FSH) and sperm
ovaries/testes ovaries/testes
production
Anterior pituitary Luteinizing(LH) or Regulates sex
Over secretion of Under secretion
Interstitial cell hormones
sex hormones of sex hormones
Stimulating(ICSH) production
Anterior pituitary Pro lactin(PRL) Causes milk
Over secretion of Under secretion
production after
milk of milk
giving birth
Anterior pituitary Growth(GH) Promotes growth
Gigantism Dwarfism
19. Major endocrine glands and their hormones(cont.)
Glands Hormones Major Disorder Disorder from
functions from too too little
much secretion
secretion
Epinephrine Promotes
Adrenal "flight or fight
and nor
medulla "reaction
epinephrine
Lower Blood Diabetes
Pancreas Insulin Shock
Sugar Mellitus
Raises blood
pancreas Glucagon
sugar
Promotes
Androgen(testo secondary male
Testes characteristics
sterone)
Promotes
Estrogen and secondary
Ovaries
progesterone female
characteristics