Respiratory System
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breathing allows—— to enter the body during————- and——to be eliminated during ———-
oxygen, inhalation, carbon dioxide, exhalation
name the part that is in the respiratory and digestive system
pharynx
nasal passages
-passages that open to the outside through the nostrils -filters air through small hair that coat the nasal cavities -warm and moisten air with mucus
pharynx
-passageway between respiratory and digestive system -carries air towards trachea and food towards esophagus
larynx
-upper section of trachea that houses the vocal cords -carries air -produces sound
epiglottis
-tiny flap that can move up or down -covers trachea when swallowing food
trachea
-located in front of esophagus, composed of rings made of cartilage which keep the traches open at all times . Connects larynx to lungs. -hair likes cilia cover the walls of the trachea to filter out dust particles
bronchi
-trachea splits into two bronchi: one tube goes to the left and one to right -carries air to lungs
bronchioles
-the division of the bronchi into smaller branches -each bronchiole ends in a cluster of alveoli
alveoli
-small bags surrouned by capillaries -site for gas exchange between the respiratory and circulatory system
lungs
-spongy elastic organs one ach side of the heart. they are enclosed in rib cage -ensures for gas exchange between the body and environment
explain inhalation
-intercostal muscles and diaphragm contract -ribs rise up and diaphragm moves down making rib cage larger -lung volume increases -air pressure inside lungs decreases -oxygen-rich air from the environment flows into lungs until there is a balance in pressure
explain exhalation
-intercostal muscles and diaphragm relax -ribs descend and diaphragm moves up making rib cage smaller -lung volume decreases -air pressure inside lungs increases -carbon dioxide-rich air inside the lungs flows out until there is a balance in pressure
what process does oxygen and carbon dioxide go through
diffusion: movement through thin membranes from area of high concentration to low concentration
how does O2 travel
inhaled an travels from alveoli(lungs) to capillaries in order for oxygen to be delivered to the cells of the body
how does CO2 travel
travels from capillaries to the alveoli ( lungs) in order to be exhaled as waste
true of false during inhalation , the conocentration of oxygen is greater in the aveoli than in the capillaries and what does this make it do
true the oxygen diffuses across the thin membrane of the alveoli and into the capillaries. the oxygen moves to the red blood cells and is delivered to all the cells of the body
true or false carbon dioxide travels in the opposite direction and is more concentrated in the capillaries than it is in the alveoli. and what does this make it do
true the carbon dioxide diffuses from the capillaries and into the alveoli, then it makes its way back up the respiratory organs and is exhaled
what happends after alveoli fills with air
the blood in capillaries surrounding the alveoli is rich in carbon dioxide since its coming back from picking up the waste from cellular respiration.