nov 13th

Question 1

Parts of the Pharynx

Answer 1

nasopharynx(opening to auditory tube), oropharynx (end of soft palate to tip of epiglottis), laryngopharynx (epiglottis to esophagus). Stratified squamis epithelium for protection

Question 2

Larynx

Answer 2

keeps food and drinjk out of airways and phonation(speach, vocal folds)

Question 3

what’s the glottis?

Answer 3

opening between vocal folds

Question 4

Trachea

Answer 4

windpipe. Cshaped rings of hyaline cartilage, Trachealis lines posterior aspect and is smooth muscle. Part way down it splits into 2 main bronchi and carina. Carina has the sensitive thing that makes u cough

Question 5

Tracheal wall inner lining:

Answer 5

respiratory epithelium, basal stem cells, mucocilary escalator (pushes muscus into esophagus)

Question 6

Adventitia

Answer 6

part of tracea wall. Outermost connective tissue

Question 7

Alveoli Cell types

Answer 7

type 1 (squamous alveolar cells) 95% of surface area. Type 2 (great alveolar cells) 5% of surface area but most numerous. Help repair, produce surfactant (helps keep the alveoli open). Alveolar macrophages (2000 die an hour helping phagosise dust and stuff u breath in)

Question 8

What lines the lungs

Answer 8

visceral pleural. the parietal pleura is along the inside of the rib cage and the space is the pleural cavity.

Question 9

Order of bronchial tree

Answer 9

Primary bronchi, lobar bronchi, segmental bronchi, Bronchioles, Terminal bronchioles, Respiratory bronchioles, Alveolar ducts, Aleveolar sacs

Question 10

Two respiratory centers of the medulla oblongata and Pons

Answer 10

ventral (primary respiratory pacemaker), dorsal (signals to the ventral to modify breathing). Pontine (signals to Ventral and Dorsal to modify breathing)

Question 11

as you age ..?

Answer 11

because u loose elasticify in lungs so ventilation delines. Fewer alveoli surface area.