Intro to Human Anatomy Chapter 1. What’s the Difference? ANATOMYPHYSIOLOGY Which has more new...
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Transcript of Intro to Human Anatomy Chapter 1. What’s the Difference? ANATOMYPHYSIOLOGY Which has more new...
![Page 1: Intro to Human Anatomy Chapter 1. What’s the Difference? ANATOMYPHYSIOLOGY Which has more new discoveries?](https://reader036.fdocuments.us/reader036/viewer/2022062801/56649e385503460f94b28e2d/html5/thumbnails/1.jpg)
Intro to Human AnatomyChapter 1
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What’s the Difference?
ANATOMY PHYSIOLOGY
Which has more new discoveries?
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Anatomy or Physiology?
• To send a nerve impulse, sodium and potassium ions must switch places in the cell
• The human tailbone is a fusion of multiple vertebrae
• When the bicep muscle contracts, it pulls on tendons and ligaments which move the lower arm
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Homeostasis
• Maintaining a stable internal environment
• Organ systems function to maintain homeostasis– Examples?
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Homeostasis
• Homeostatic mechanisms work by:
1. Having a set point (normal, balanced)
2. Receptors in the body detect deviations or stimulus• Increase or decrease past the set point
3. Trigger a set of events to bring the situation back to normal
![Page 6: Intro to Human Anatomy Chapter 1. What’s the Difference? ANATOMYPHYSIOLOGY Which has more new discoveries?](https://reader036.fdocuments.us/reader036/viewer/2022062801/56649e385503460f94b28e2d/html5/thumbnails/6.jpg)
Blood Sugar Regulation
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Homeostasis
• NEGATIVE FEEDBACK – Correction occurs opposite direction of stimulus– Examples:
• Body temp rises; cooling mechanisms activated• Body temp drops; heating mechanisms activated
– Other examples?
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Homeostasis
• POSITIVE FEEDBACK - Stimulus amplifies response in the same direction
– Examples:• Chemicals present in a blood clot lead to more clotting• A baby drinking mother’s milk causes more milk
production• Pressure in the uterus during childbirth leads to stronger contractions
![Page 9: Intro to Human Anatomy Chapter 1. What’s the Difference? ANATOMYPHYSIOLOGY Which has more new discoveries?](https://reader036.fdocuments.us/reader036/viewer/2022062801/56649e385503460f94b28e2d/html5/thumbnails/9.jpg)
Homeostasis
• VITAL SIGNS– A measure of homeostasis– Indicate that someone is alive
• What is measured in a test of vital signs?
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Organization of the Body
• Lots of vocabulary to describe the body– Why?
• Allows doctors to communicate as clearly as possible
– Which would you rather hear as a surgeon?• “It hurts in the left upper side of my chest.”• “I’m having pain in the left lateral pleural cavity,
superior to the heart.”
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Organization of the Body
• Many body cavities lined by membranes
PARIETAL –
lines body cavity
VISCERAL –
covers organ
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Organization of the Body
• Always refer to body in ANATOMICAL POSITION– Face forward– Palms forward– Note: Right and left
refer to the patient
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Organization of the Body
• To observe different sections, we cut the body along various imaginary planes
– SAGITTAL (median)– FRONTAL (coronal)– TRANSVERSE
(horizontal)
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Organization of the Body
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What does this mean?
The lesion is located in the right thorax just lateral to
the mid-sagittal plane.