What are the Human Body Systems We Have Studied So Far?  Skeletal  Muscular  Digestive  Now…  Respiratory  Circulatory  Nervous  Immune/Lymphatic

The Respiratory System  Chapter 8.1 (p. 206)

Function of the Respiratory System  The primary function of the respiratory system is to supply the blood with oxygen, in order for the blood to deliver oxygen to all parts of the body.

Respiration Breathing and Respiration are NOT the same. Breathing… Movement of the chest that brings air in the lungs and removes waste gasses. Respiration… glucose + oxygen = CO2 + H20 + energy

 Breathing is the movement of the chest that brings air into the lungs and removes waste gases.  Respiration is when your cells use oxygen and dissolved food to form energy!

 1) Pharynx—a tube-like passageway used by food, liquid, and air.  2) Epiglottis—A flap of tissue that separates air and food going down.  3) Larynx—the airway to which two pairs of horizontal folds of tissue, called vocal cords are attached.

 4) Trachea—Long tube of thick cartilage that brings air to the lungs  5) Bronchi—2 smaller tubes that lead into the lungs and split off into smaller and smaller tubes, such as bronchioles and alveoli.

Organs of the Respiratory System

 The alveoli are the final branchings of the respiratory tree and act as the primary gas exchange units of the lung.

 Its all about your diaphragm! Similar to a squeezed bottle.  Your diaphragm is beneath your lungs and contract/relaxes to move gases in an out!

What are hiccups?  An involuntary spasm of the diaphragm and respiratory organs, with a sudden closure of the glottis and a sound like a cough.

 Respiratory Infections  Chronic Bronchitus  Emphysema  Lung Cancer  Asthma

Lung Capacity  The volume of both lungs combined or how much air your lungs can hold.

Respiratory Rate  The number of breaths a living being, such as a human, takes within a certain amount of time (frequently given in breaths per minute).  Who do you think has a faster respiratory rate?