Ex 52 53 Respiratory Upper Respiratory external nares

Ex. 52 -53: Respiratory

Upper Respiratory

external nares (nostrils)

nasal cavity

nasal septum

perpendicular plate

vomer bone

internal nares

Nasal conchae superior middle inferior

Paranasal sinuses

ethmoid

frontal

maxillary

sphenoid

hard palate

pharynx

nasopharynx

oropharynx

laryngopharynx

larynx

epiglottis

thyroid cartilage

arytenoid cartilage

corniculate cartilage

cricoid cartilage

Vocal cords False vocal cord True vocal cord

glottis (opening)

Lower Respiratory Tract

trachea

carina

respiratory Tree

primary bronchi

secondary (lobar) bronchi

tertiary (segmental) bronchi

intralobular bronchiole

terminal bronchiole

respiratory bronchiole

alveolar duct

alveolar sac

alveoli

lungs

lobes

Right lung n – 3 lobes

Left lung n – 2 lobes

RESPIRATORY MUSCLES KNOW the muscle involved in normal and forced ventilation

INSPIRATORY MUSCLES

diaphragm

external intercostals

sternocleidomastoid

pectoralis minor

scalenes

EXPIRATORY MUSCLES

internal intercostals

rectus abdominis

external oblique

internal oblique

Transverse abdominis

parietal pleura n n Outer surface Contacts ribs

pleural cavity n Space between

visceral pleura n n n Inner surface Covers lung Like cellophane

Next: Ex. 54 & 55 Breathing & Respiratory Volumes