grade 8 science unit 4: “cells, tissues, organs & organ systems” chapter 12: the health of...
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Grade 8 ScienceUnit 4:
“Cells, Tissues, Organs & Organ Systems”
Chapter 12: The health of the body depends on the health of its interdependent systems.
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How Body Systems are Connected...
1. All the cells of the body have the same basic needs.
•Energy•Nutrients•Oxygen
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•Removal of wastes
Body systems work together to provide cells with what they need.
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Example: Cellular Respiration
•A chemical process that releases energy that is stored in glucose.
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Glucose
Oxygen
Energy
Carbon dioxide
Water vapour
Cellular Respiration
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Organ systems that are directly involved with cellular respiration include:
•Respiratory system•Digestive system•Circulatory system•Excretory system
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More Connections Between Systems include...•Circulatory & Respiratory
•Circulatory & Digestive•Nervous & Muscular
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2. Chart - Circulatory & Respiratory•Blood picks up oxygen from the lungs and brings to all cells of body.
•Blood get dirty CO2 and goes to lungs/exhaled.
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Circulatory & Digestive
•Digestive system breaks down food into glucose/nutrients.
•Nutrients go to blood from small intestine.
•Blood carries nutrients to body cells.
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Nervous & Muscular•Keep your body temperature stable.
•Nervous system monitors environment conditions, through temperature-sensing cells in the skin.
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•Brain picks up signals from nerves and sends new signals to parts of the body that are affected (muscles).
•Ex. If cold, the muscles will shiver.
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Body Systems & Health
•Maintaining the health of each body system keeps the network of systems, and the whole body healthy.
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•3. Factors that affect the health of the body systems include:1. Diet2. Exercise3. Stress
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The Balance of Body SystemsCan be affected by both:• Genetic factors• Lifestyle factors
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4. A)Genetic Factors
•Things you inherit from one or both birth parents.
•Out of your control
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4.B)Lifestyle Factors page 449•Within your controlInclude:•Diet•Smoking•Drugs and alcohol•Lack of exercise
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To support healthy organs and body systems, we all have the same basic needs.
•Clean air and water•A nutritious and well-balanced diet
•Exercise•Restful sleep
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Scientific Technologies5. Insulin pump: a device that can be programmed to deliver a specific dose of insulin at specific times during the day. Worn at all times. (Diabetes)
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5. Artificial Heart: used when a donor heart is unavailable. It is difficult for humans to stay alive for any length of time using hearts from other species.
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Artificial Hearts
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“Artificial Organs”
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“The Effect of Activity on Heart Rate and Breathing Rate”
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6. Examples of Careers in Health•Lab technician•X-ray technician•Physiotherapist•Nutritionist•Coaches•Doctor
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•Public health nurse