This book is dedicated to all the Athletes; the football players and basketball players;
the tennis players and lacrosse players;
the swimmers and the golfers;
the volleyball players and the figure skaters;
the ballet dancers and the skiers;
the cheerleaders and the baseball players;
We hope, that through this book, you will learn
more about yourself and the science behind
some of the incredible things you do.
This book was created and published on StoryJumper™
©2014 StoryJumper, Inc. All rights reserved.
Publish your own children's book:
www.storyjumper.com
A Scientific Guideto theBody of an Athlete2
Your body is an amazing and intricate machine. It can be used to
accomplish many fantastical feats. In
this book, you will learn about four
main systems, and how they help the
body function.
3
Positive and Negative Feedback
Negative Feedback maintains homeostasis by keeping the body at a stable point. Positive feedback will cause change until something else
occurs. Positive feedback upsets the balance.Example of Positive Feedback: Your body causing you to have contractions
during childbirth, until the baby has been expelled from your body Example of Negative Feedback: Your body sweating to cool you off when
you get too warm, and shivering when you get too coolSigns of Homeostatic Imbalance: Some signs are low energy and dysfunctional
digestion.
4
5
Circulatory System
This system helps maintain homeostasis by using white blood cells to fight infection clots open wounds to decrease blood loss and
prevent the lowering of blood pressure, and keeps body temperature
at a stable point.Levels of Organization: Blood Cells, Tissue, Heart, Circulatory SystemExample of Negative Feedback: High blood loss, resulting in a decrease of blood
pressure, cause receptors to tell the "control center", and causes the heart to begin
contracting faster.
Example of Positive Feedback: The increase in white blood cells when the body is
infected or sick, until the infection has been controlled and eliminated.
6
Excretory System
This system helps maintain homeostasis by removing excess salt, water, urea, and other substancesLevels of Organization: Cells, Tissue, Organ, Excretory SystemExample of Negative Feedback: The kidneys controlling the amount of water
in the blood by excreting more or less water in urine.
Example of Positive Feedback: Urine builds up in the bladder until it is about
half full, after which a nerve impulse is sent to the sphincter that controls
the opening to the urethra. In response to the impulse, the sphincter relaxes
and lets urine flow into the urethra.
7
Endocrine System
This system helps maintain homeostasis by secreting hormones tokeep different parts of the body at a stable point.Levels of Organization: Cells, Glands, Organ, Endocrine SystemExample of Negative Feedback: The release of the parathyroid hormone from the parathyroid
gland in response to a decrease in blood calcium, and, conversely, a reduction of parathyroid
production in response to high calcium levels.
Example of Positive Feedback: The secretion of the hormone oxytocin, which causes contractions
during childbirth, and persists until the child has been expelled from the body.
8
Nervous System
This system helps maintain homeostasis by controlling and regulating all the systems and different parts of the body, and acts to
keep the body at a stable point.Levels of Organization: Neuron, Nervous Tissue, Brain, Spinal Cord, Nervous SystemExample of Negative Feedback: When blood temperature rises too high, this is sensed by
neurons in the hypothalamus of the brain, and messages are sent to the blood vessels in the
skin. These blood vessels then dilate so more blood flows close to the body surface and
excess heat radiates from the body. If the body is still too hot, the brain activates sweating.
Example of Positive Feedback: The suckling reflex of the breastfeeding child sends a
signal to the brain to release more prolactin in order to produce more milk in the
mammary glands.
9
During exercise you may notice you start to sweat. This is how your body temperature stays in balance when
temperature is increased. Sweating takes a lot of water out
of your body, therefore in order to stay in balance you must stay
hydrated and drink a lot of water.Stay in BalanceDrink Water
10
Blood Pressure
During exercise, your blood pressure increases. In order to increase the efficiency of nutrient
and energy delivery to active muscles, your blood vessels shrink
slightly. After your excersise period your blood pressure slowly returns
to normal.When exercisng
11
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12
READ
This book is dedicated to all the Athletes; the football players and basketball players;
the tennis players and lacrosse players;
the swimmers and the golfers;
the volleyball players and the figure skaters;
the ballet dancers and the skiers;
the cheerleaders and the baseball players;
We hope, that through this book, you will learn
more about yourself and the science behind
some of the incredible things you do.
This book was created and published on StoryJumper™
©2014 StoryJumper, Inc. All rights reserved.
Publish your own children's book:
www.storyjumper.com
A Scientific Guideto theBody of an Athlete2
Your body is an amazing and intricate machine. It can be used to
accomplish many fantastical feats. In
this book, you will learn about four
main systems, and how they help the
body function.
3
Positive and Negative FeedbackNegative Feedback maintains homeostasis by keeping the body at a stable point. Positive feedback will cause change until something else
occurs. Positive feedback upsets the balance.Example of Positive Feedback: Your body causing you to have contractions
during childbirth, until the baby has been expelled from your body Example of Negative Feedback: Your body sweating to cool you off when
you get too warm, and shivering when you get too coolSigns of Homeostatic Imbalance: Some signs are low energy and dysfunctional
digestion.
4
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"Body Systems"
A short book explaining how the body works to maintain internal homeostasis, and how the body systems play a part in that.
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