2.2 the respiratory system. function the exchange of oxygen and carbon dioxide between the red blood...
TRANSCRIPT
Function
The exchange of oxygen and carbon dioxide between the Red blood cells and the lungs
The circulatory system transports the oxygen and carbon dioxide to and from the rest of the body cells
Anatomy of the Respiratory System
12Nasal passage
Mouth
Larynx
Lung
Right BronchusLeft Bronchus
Diaphragm
Epiglottis
Pharynx
Trachea
Bronchiole
Alveoli
Function of the Parts
Nasal Passage/Mouth – warms the air as it enters the body
Epiglottis: flap of tissue that divides the respiratory system digestive system
Pharynx: collects the warmed air
Larynx: contains the vocal chords that vibrate to make sound as air is pushed out from the lungs
Diaphragm: a muscle that helps to change the pressure inside the lungs during inhalation and exhalation
Function of Parts Continued….
Trachea: smooth muscle reinforced by cartilage rings. It is the main tube that directs air into or out of the lungs. This tube branches into smaller tubes within the lungs.
a) Bronchus (bronchi): one of two large branches
into lungsb) Bronchioles: any of the tiny branches into
which a bronchi divides
Alveoli: sacs that fill with oxygen when we breath in and carbon dioxide when we breath out. They are the site of gas exchange between the lungs and the circulatory system.
Lining of the Tract
The interior lining of the respiratory system is covered in cilia (hair-like structures)
Cilia trap debris you breathe in
Mucous secreted by cells collect the debris together (what do you think “snot” is?) so that body can get rid of it via sneezing (from your nose), coughing (from your lungs)
Are like a balloon and are composed of a membrane that is kept moist within the lung Oxygen dissolves into the thin layer of liquid that sits on the inside of the sac The sac is covered by tiny capillaries so the oxygen can move into the bloodstream
Alveoli
Capillary
To the Pulmonary Vein of the heart
From the Pulmonary Artery of the heart
“Breathing in”
Oxygen enters the lungs
Chest volume is large Ribs move up and out Diaphragm contracts
and pushes down
“Breathing out”
Carbon dioxide exits the lungs
Chest volume is small Ribs move down and in Diaphragm relaxes and
pushes up
INHALATION EXHALATION
Inhalation Exhalation
Air RUSHES in
*pressure is lower inside the lungs that outsideAir RUSHES out*pressure is higher inside the lungs that outside
Review Questions:
1) Why are cilia important in the respiratory system?
2) People that smoke often have trouble breathing. What part of the respiratory system do you think is affected by smoking and how does it affect your ability to breathe?
3) Describe how oxygen and carbon dioxide are exchanged.
4) What is the difference between inhalation and exhalation and how does each work?