Respiratory System Flashcards Preview

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Flashcards in Respiratory System Deck (19):
1

Conducting Portion

- Conducts air into the lungs
- Pharynx - back of the throat
- nasal cavities
- Nasopharynx - sometimes nasal cavities and pharynx are lumped together
- larynx - voice box
- Trachea - conducting tube
- Bronchi
- bronchioles
- Terminal Bronchioles

2

Respiratory Portion

- Gas exchange
- respiratory Bronchioles - has alveolus branching off
- alveoli - sac like structure with cells that allow for gas exchange

- can also have gas exchange in the alveolar ducts

3

Nasal Conchae

- 3 Conchae: inferior, medial and superior
- shelves of bone and cartilage that protrude into nasal cavity
- lined by respiratory epithelium
- swell bodies - thickened region where we have vasculature (venous plexus)
--as air passes over, the blood in swell bodies helps to warm the air as it passes through

- Superior Conchae contains olfactory epithelium used for smell

4

Respiratory Epithelium

- Pseudostratified ciliated columnar epithelium
- Goblet Cells - secreting mucous
- May contain Brush cells with short microvilli
---chemosensory receptor cells with synaptic contact to afferent nerve endings

5

Olfactory epithelium

- upper layer nuclei are support cells
- middle layer - olfactory and bipolar neurons
- Deepest layer are basal cells

Olfactory glands
- Bowmans glands - serous glands
- pass down into lamina propria

Fila olfactoria
- bundles of nerves
- found in lamina propria

- olfactory neurons contain non motile cilia

- axons eventually make their way up to the olfactory bulb which sends signals all the way to the brain

6

Larynx

- Voice box
- True vocal cords and False vocal cords
- contains hyaline cartilage

7

True Vocal Cord

- Stratified squamous non keratinized epithelium
- contains skeletal muscle
-- vocalis muscle
-- voluntary movement of the vocalis muscle is how we speak

8

False Vocal Cord

- lined by true respiratory epithelium
- seromucous glands - continue all the way down to the bronchi
--combination of serous and mucous

9

Trachea

- The wind pipe
- Respiratory epithelium
- C shaped ring of hyaline cartilage
--smooth muscle connecting one end to the other
- seromucous glands

10

Lungs

- Outer layer - parietal layer
- Inner layer - visceral pleura
- in between - visceral pleura cavity

11

Bronchi

- Pair of bronchi
- Respiratory Epithelium
- C shaped ring becomes more intermittent
- intermittent plates of hyaline cartilage
- still have seromucous glands
- last structure that has hyaline cartilage and seromucous glands

12

Bronchiole

- no cartilage and no seromucous glands
- lined by simple cuboidal ciliated epithelium

13

Terminal Bronchiole

- Simple cuboidal ciliated epithelium
- Contains many Clara Cells

14

Clara Cells

- Produce surfactant
Detoxify substances
- secretes antimicrobial peptides - IgA

15

Respiratory Bronchiole

- Simple cuboidal ciliated epithelium
- some sac like alveoli

16

Alveolar Duct

- Squamous cells with openings to alveolar sacs

17

Alveoli

- Alveolar Sacs lined by type I and type II pneumocytes
- Type II pneumocytes secrete surfactant
- has phagocytic macrophages
--phagocytize inhaled substances

- gas exchange occurs across the type I pneumocytes

18

Gas Movement

- oxygen passes across the epithelium of the type I pneumocytes
- through the basement membrane
- through epithelium of capillary

- CO2 is flowing the opposite direction

19

Type II Pneumocytes

- produce surfactant
- surfactant makes sure that alveolus doesn't collapse or stick together
- soapy type of consistency