The%20Endocrine%20System - PowerPoint PPT Presentation

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The%20Endocrine%20System

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The Endocrine System – PowerPoint PPT presentation

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Title: The%20Endocrine%20System


1
The Endocrine System
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  • The Endocrine System are the glands that secrete
    hormones into the bloodstream

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Endocrine System
  • One of the bodys two communication systems
  • Nervous and endocrine
  • A set of glands that produce hormones-- chemical
    messengers that circulate in the blood

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Hormone
  • Chemical messengers produced by the endocrine
    glands and circulated in the blood
  • Similar to neurotransmitters in that they are
    also messengers
  • Slower communication system, but with longer
    lasting effects

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Endocrine System
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Hypothalamus
  • Brain region that controls the pituitary gland
  • Controls homeostasis the bodies ability to
    remain at a status quo level

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Pituitary Gland
  • The endocrine systems gland that controls the
    other endocrine glands
  • Called the master gland
  • Located at the base of the brain and connects to
    the hypothalamus

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Pituitary Gland
  • Controls thirst by controlling the amount of
    water in the bodys cells
  • Controls female contractions, and tells the
    mammary glands to produce milk for newborns

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Pituitary Gland
  • May control grooming habits, companionship, and
    sexual behavior
  • Controls the flow of the human growth hormones
    dwarfism and gigantism

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Pineal Gland
  • Responsible for the hormone Melatonin
  • Increased levels of Melatonin cause behaviors
    associated with sleep
  • Decreased levels of Melatonin cause behaviors
    associated with wakefulness

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Thyroid Gland
  • Endocrine gland that helps regulate the energy
    level in the body
  • Located in the neck

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Endocrine System
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Thyroid Gland
  • controls body temperature
  • Controls metabolism our bodys ability to
    transform the food we eat into usable energy
  • Overactive? Behaviors may include excitability,
    insomnia, ADD, agitation, difficulty focusing
  • Reduced Activity? Behaviors may include
    sleepiness, reduced muscle tone, overweight

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Adrenal Gland
  • Endocrine glands that help to arouse the body in
    times of stress
  • Located just above the kidneys
  • Release epinephrine (adrenaline) and
    norepinephrine (noradrenaline)

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Endocrine System
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Adrenal Glands
  • Increase heart rate, blood pressure, and blood
    sugar

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Pancreatic Gland
  • Regulates the level of blood sugar (insulin) in
    the blood

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Endocrine System
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Pancreas
  • Insulin is needed in the body to break down
    sugars in the body
  • Too much insulin in the body devours all of the
    sugar in the blood. Behaviors exhibited include
    sluggishness and inattentiveness.

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  • Too little insulin causes a buildup of sugar in
    the blood and makes the kidneys use a lot more
    water to flush it out of the body. The extra
    water needed to flush the sugar comes from
    surrounding cells, which in turn dehydrates them
    and leaves them vulnerable to infection and
    poisons.

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Sex Glands
  • Ovaries (females) and testes (males) are the
    glands that influence emotion and physical
    development.
  • Testosterone primary males hormone
  • Estrogen primary female hormone
  • Males and females have both estrogen and
    testosterone in their systems.

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Endocrine System
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Gonads
  • Testicles release androgens (male hormones)
  • Ovaries release estrogens (female hormones)
  • The presence of these chemicals influence male
    and female reproductive characteristics.

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