1 / 15

The Respiratory System 2.

The Respiratory System 2. The respiratory system consists of an airway and lungs. T he airway conducts air into the lungs Breath of air passes in sequence : Nostrils, nasal cavities, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli. The lower respiratory tract.

snow
Télécharger la présentation

The Respiratory System 2.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Respiratory System 2.

  2. The respiratorysystemconsists of an airway and lungs • The airway conducts air into the lungs • Breath of air passes in sequence: • Nostrils, • nasal cavities, • pharynx, • larynx, • trachea, • bronchi, • bronchioles, • and alveoli

  3. The lowerrespiratory tract • Trachea = windpipe • Main bronchi • Lobarbronchi • Lungs • Bronchioles • - Alveolarsacs • - Alveoli

  4. The trachea = windpipe • Tube: • inner 20-25 mm indiameter • 10-16 cminlength • 15 – 20 incomplete C-shaped cartilaginous rings • The cartilaginous rings are incomplete because this allows the trachea to collapse slightly to allow food to pass down the esophagus • Posterior of trachea: smooth muscle and connective tissue trachea

  5. Great hornedowl – Amerikai uhu

  6. Air passageway • Trachea two main bronchi (Left + Right) • The right main bronchus is wider, shorter, and more vertical than the left main bronchus • L main bronchus  twolobar bronchi • R main bronchus three lobar bronchi • Lobar bronchi  primary bronchioles • primary bronchioles  alveolar ducts • alveolar ducts  alveolar sacs  alveoli

  7. 1: L main bronchus • 2: R main bronchus • 3: twolobarbronchi • 4: threelobar bronchi • 5: primary bronchioles • alveolarducts • 6: alveolarsacs • alveoli 1 2 3 4 5 6 6

  8. The Lung • Every time you breath in and out your lungs are hard at work • Lungs are surrounded by the rib cage, on sit on diaphragm • The respiratory zone is the site of gas exchange with blood • Color: pink, after years becomes grey http://www.youtube.com/watch?v=nJuFmyXeHkA /

  9. Parts • Base: bottom • Apex: tip • Hilus: placewherevessels, bronchiarestepin and out thelung

  10. The Lung • The human lungs are the organs of respiration in humans • Humans have two lungs, with the left being divided into two lobes and the right into three lobes • Together, the lungs contain approximately 1500 miles (2,400 km) of airways and 300 to 500 million alveoli, having a total surface area of about 70 m2 in adults (the same area as a tennis court)

  11. The pleura • The lungs are surrounded by the pleurae, a serous membrane which folds back upon itself to form a two-layered, membrane structure. • The thin space between the two pleural layers is known as the pleural space; it normally contains a small amount of pleural fluid. • The outer pleura (parietal pleura) is attached to the chest wall. • The inner pleura (visceral pleura) covers the lungs and adjoining structures, i.e. blood vessels, bronchi and nerves.

More Related