Transcript 7th Grade Health Digestion

Respiratory System #1
Types of Respiration
External: Actual breathing, it is the mechanical way
to get oxygen into the lungs
Internal: Occurs in the lungs, the exchange of
oxygen and CO2 between your alveoli and
bloodstream
Cellular: occurs inside the muscles, oxygen is
used to burn food and carbon dioxide is
produced as a waste product
Pharynx
more commonly called the throat. It
connects the nose and mouth to the rest
of the respiratory system.
Tonsils
Masses of lymph tissue, that
traps and destroys
bacteria
Larynx
sits on the top of the trachea and
contains the vocal cords.
Trachea
the tube that extends down from the larynx,
through the neck and into the chest.
Pleural Membrane
thin layer of skin like material that protects the
lungs and keeps moisture in to lubricate for
breathing.
Alveoli
air sacs found in clusters at the end of each
bronchiole. Resembles a bunch of grapes.
Diaphragm
muscle that separates the abdomen and chest.
Controls breathing.
Lungs
2 sponge-like organs found in the chest. The
right lung has three lobes and the left lung
has two.
Bronchi
2 tubes at the end of the trachea connecting to
each lung.
Bronchioles
Tiny divisions of the bronchi tubes
Nasal Septum
a thin sheet of cartilage and soft bone that
divides the nasal cavity into the right and left
side
Sinuses
air filled cavities in certain facial and cranial
bones
Eustachian Tubes
tubes that connect the upper throat to the
middle ear and help with pressure.
Adenoids
masses of lymph tissue on the wall of the
nasopharynx. Their function is to trap and
destroy bacteria
The adenoids are present in all infants and
children, and start to regress just before
puberty. They are usually absent in adults.
Epiglottis
flap of cartilage that covers the opening of the
larynx. The epiglottis keeps food and liquid
out of the trachea.