Download The Respiratory System Upon completion of this lesson, students

The Respiratory System
Lesson 1:
The Respiratory System
Upon completion of this lesson, students
should be able to …



Explain the purpose and function of the
respiratory system.
List and explain the structures and
functions of the organs of the respiratory
system.
Explain the different respiratory volumes
and capacities.







Mouth and Nose
Pharynx
Passes through the larynx
Into the trachea
Into the alveoli
diffuses through the capillaries to the arteries
The waste-rich blood from the veins releases
carbon dioxide into the alveoli


The diaphragm helps
carbon dioxide follows the same path out of
the lungs when we exhale

See This!!!!!
◦ Nose
◦ Paranasal sinuses
◦ The pharynx (or throat)
◦ larynx (or voicebox)
◦ Trachea splits into two branches
called bronchi
◦ Tiny branches of the bronchi called
bronchioles
◦ lungs




Cleanses inhaled air
◦ Cilia and mucus
Moistens
Warms
Assists with drainage

Septum
◦ Divides nose into left and right




Common path for air and food
Branches into trachea (air passageway)
and esophagus (food passageway)
Contains the tonsils


Thyroid cartilage:
◦ “Adam’s apple”
Epiglottic cartilage:
◦ Aka epiglottis
◦ Closes over the trachea (windpipe) during
swallowing
◦ Check This out


lined with mucous membrane and cilia
open passageway through which air reaches
the lungs
 Extend
into the lungs to the
bronchi
 View
This

bronchi subdivide into smaller and smaller
branches called bronchioles
 Bronchioles
terminate in air
sacs called
alveoli



Small air sacs
elastic
Surrounded by network of capillaries for gas
exchange
 Supply
oxygen
 Remove wastes and toxins

6 small groups of four

Diaphragm
◦ Forms floor of thoracic cavity
◦ Separates the abdomen from the
thoracic cavity
 Orolaryngologist
 Pulmonologist