Respiratory System
Jan 03, 2016
Respiratory System
Discover ActivityPage 112
Respiratory System Gases What do you already know about the
Function of Respiratory System? What gases are exchanged by the
respiratory system? What do you think happens in the
body when a person holds his or her breath?
Respiratory System Function Respiration
to obtain and use oxygen to get rid of carbon
dioxide and water
Respiratory System 2 parts
Breathing moving air in
and out Cellular Respiration
Cellular Respiration C6H12O6 + O2
CO2 + H2O + ATP Glucose and oxygen makes
carbon dioxide, water and energy Happens in the Mitochondria of
the Cell
Working Together Respiratory system,
Digestive system and Circulatory system
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How Lungs Work.
Air Flow through the System
Process of Breathing Inhalation
Lung volume increases Diaphragm contracts/flattens Ribcage moves up and out Air flows in
Process of Breathing Exhalation
Lung volume decreases Diaphragm relaxes/moves upward Ribcage back to normal position Air flows out
Breathing and Speaking Larynx
Voice box Located at top of trachea
Vocal cords Air rushes through opening Vibration creates sound
Smoking and Your Health
Three major chemicals Tar Carbon Monoxide Nicotine
addictive chemical
Three major chemicals Tar
Dark sticky substance that forms when tobacco burns
Makes cilia clump together so they can’t prevent harmful material from getting to lungs
Three major chemicals Carbon Monoxide
Colorless, odorless gas Binds to hemoglobin in
RBC’s and takes the place of oxygen so body can’t get enough oxygen
Three major chemicals Nicotine
Addictive chemical Increases heart beat and blood
pressure Increases activities of the
Nervous system
Effects of Nicotine on the Body
Four Respiratory Problems Chronic Bronchitis Emphysema Lung Cancer Atherosclerosis
Emphysema Caused by
chemicals in Tobacco smoke
Affects on Blood Vessels Chemicals in blood are
absorbed by vessels Walls get irritated Irritation contributes to
atherosclerosis
Passive Smoking Inhaling side-stream smoke Side-stream Smoke
smoke that enters the environment from burning tobacco
Mainstream smoke smoke that is inhaled
directly into the mouth through a cigarette, pipe, or cigar
Smokeless Tobacco Chewing Tobacco
Cancer of the mouth (tongue, cheek, gums)
Cancer of the throat
Why do people start Peer Influence Parent Example Advertising Others?
Four reasons not to start Dangerous (unhealthy) Expensive Unpleasant odor Unattractive
Case Study #2You are at the mall and are offered free cigarettes. Your friends want to try them. Use the 5 C’s to make a choice about whether you will join them or abstain.
Breathing Emergencies Help someone who is
Choking or do
Rescue Breathing
Help someone who is Choking Place thumb side of fist against
middle of abdomen just above navel. Grasp fist with other hand. Give quick, upward, thrusts. Repeat until object is coughed up or
person becomes unconscious.
Rescue Breathing
If air won’t go in?
Excretory System
Function Collects waste produced by
cells Removes the wastes from the
body Excretion
2 Wastes Water Urea
A chemical that comes from the breakdown of proteins
Kidneys Filter blood Ureters Bladder Urethra
Nephrons Tiny filtering factories that
remove wastes form blood and produce urine
Stages of Urine Formation Wastes and needed materials are
filtered out of blood Most of needed materials are
returned to blood Wastes are eliminated from the
body
Chemical Analysis Useful? Can detect medical problems
Diabetes = glucose present Improper kidney function=
protein present
Homeostasis Water More sweat, less drinking Less volume of urine
Other organs that help Lungs Skin Liver
Liver function Breaks down waste so it can
be excreted Produces urea by breaking
down proteins Recycling facility