HTHSCI 1H06 B Lecture 10: Respiratory Anatomy Notes
22 Jun 2018
School
Department
Course
Professor
RESPIRATORY ANATOMY
D§D
DD
.
Functions of the respiratory system
1
Gas exchange
2
Regulate blood PH
3Provide for olfaction (smell )→sensory neurons In nasal mucosa 1CNI )
4provide for phonation 1sound )
skeletal structure of the thorax
•
12 thoracic vertebrae
•
12 pairs of ribs + costal cartilages
-
7true ribs : directly touch sternum
-3false ribs :cartilage ribs that touch other ribs but not the Hemum
.
and provide flexibility
floating ribs :ribs that don't touch the sternum or costal ribs which serve as
attachment site for diaphragm
•sternum
-
Mahubvium
-
Body
-
xipnoid
Features of the ribs
•
Ribs articulate with thoracic
•
Costal angle is the
vertebrae 1synovial joints )weakest spot
•
costal groove : space that
protects mletlostal VAN
Muscles of Breathing
elevate ribs /
Lower diaphragm
enlarge thorax
\depress ribs
compress abdomen
elevate diaphragm
compress thorax
ntevwstal muscles
.
External intercostals (outside )→large muscle @back
,but @front tendons show as muscles thin
-
Inspiration
•Internal intercostals Iinside )→most muscle is @front ,but thins out @back
-
Expiration
•Innermost Intercostals
-
IGNORE
lntevcostal VAN
•
pleural Cathy )
•
Innermost Inter costal <
•
Internal Intercostals ]
•
costal groove ).
evlostal VAN Imixed spinal nerve
)<
•External Intercostals #
•
To remove blood ,pus ,or air you slick aneedle at the lop of the rib away from the VAN
Blood supply of the thoracic cage
•Ready "
lnlevcostal arteries come off of the descending aorta Ithoracic aorta )
-
Meets with thoracic A
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detfeenmdhnggaoourstar
•
thoracic Vcomes to the top of the lung +drains with the subdauan vein imenostalv
•
hemiohygouj Vdrains Into azygous Vwhich dumps blood into superior vena cava .
un mtehostal A
,v
•antlnw amend relieve blood from thoracic Almammory -will perforate +supply mammory \••
µ
glands )internal Internal
thoracic vthurauo A
Diaphragmatic Origin thematic
•
Skeletal muscle on outside for the perimeter of the inferior surface of lung
•
In the middle is abroad ,flat Central tendon
-
Apo neurosis :broad ,flat tendon
•
On inferior surfaces of costal cartilages and across floating one (r)and across TIZ
is where the muscle attaches
-
Rside sits up higher due to the liver
-
when you contraht the diaphragm comes down and you inhale
-
Inferior abdominal muscles bulge
•
Supplied by the Phvehic nerve 103,4 ,5keeps you alive )
•
many structures pass through the diaphragm
-
Interior vena cava →runs through the central tendon
-
Aorta because central Hhdon maintains
-
Esophagus openness of IVC no matter what
State of contraction the diaphragm
IS In
Document Summary
Provide for olfaction ( smell ) sensory neurons. 1 cni ) provide for phonation 1 sound ) skeletal structure of the thorax. : cartilage ribs that touch other ribs but not the. Hemum and provide flexibility floating ribs : ribs that don"t touch the sternum or costal ribs which serve as attachment site for diaphragm sternum. Costal angle is the weakest spot costal groove : space that protects mletlostal. Lower diaphragm enlarge thorax depress ribs compress abdomen elevate diaphragm compress thorax ntevwstal muscles. External intercostals ( outside ) large muscle @ back but @ front tendons show as muscles thin. Most muscle is @ front but thins out @ back. , pus , or air you slick the lop of the rib away from the. Blood supply of the thoracic cage lnlevcostal arteries come off of the descending aorta. V comes to the top of the lung + drains with the subdauan vein hemiohygouj v drains.
