Main bronchus, also called primary bronchus, is the duct between branching points 1 and 2, divided into 2 ducts from trachea as we have 2 lungs.
主支氣管係1號分支點同2號分支點之間既管，我地有兩條主支氣管因為我地有兩個肺。
Lobar bronchus, also called secondary bronchus, is the duct between branching points 2 and 3, divided into 2 ducts at the left lung and 3 ducts at the right lung from main bronchi as we have 2 lobes at left lung and 3 lobes at right lung.
肺葉支氣管係2號分支點同3號分支點之間既管，我地有五條肺葉支氣管因為我地總共有五塊肺葉。
Segmental bronchus, also called teritary bronchus, is the duct between branching points 3 and 4, divided into several ducts from lobar bronchi.
小葉支氣管係3號分支點同4號分支點之間既管，由肺葉支氣管分好多條出黎。
Conducting bronchiole is the duct approximately between branching points 4 and 20, the last conducting bronchioles of each branches are also called the terminal bronchiole.
傳導細支氣管大概係4號分支點同20號分支點之間既管，每一抽野既最後一條傳導細支氣管又叫做末端細支氣管 (terminal bronchiole)。
Respiratory Zone 呼吸區 (I personally think gaseous exchange zone is a better name)
Tissues that located in the respiratory zone are mainly responsible for gaseous exchange.
呼吸區入面既組織主要係負責氣體交換。
This figure shows the respiratory zone structure, including (with sequences) respiratory bronchiole, alveolar duct and alveolus (The plural form of alveolus is alveoli).
張圖顯示番呼吸區入面既結構，包括 (順次序既) 呼吸細支氣管 (respiratory bronchiole) 、肺泡管 (alveolar duct) 同埋肺泡 (alveolus)。
Respiratory bronchiole is the duct approximately between branching points 16 and 25, divided from terminal bronchioles.
呼吸細支氣管大概係16號分支點同25號分支點之間既管，由末端細支氣管分支而成。
Alveolar duct is the duct divided from respiratory bronchioles, attached to alveolar sac.
肺泡管由呼吸細支氣管分支而成，黐住成個肺泡囊 (alveolar sac) 。
Alveolus is the actual site for gaseus exchange taking place in, with 1 cell thick membrane and vessels surrounded.
肺泡就真係做氣體交換既地方啦，每個肺泡比一個細胞厚度既膜同埋微絲血管包住。
This whole structure provides a massive surface area for gaseous exchange to carry out. In fact, the normal lungs have around 75 square metres total surface area provided. It's nearly half of a volleyball court.
成個結構提供左一個好撚大既面積地方比我地做氣體交換，個面積差唔多有半個排球場咁大。
During breathing, we need to move a little bit, meaning that muscles are getting involved in the breathing process. There are two muscles involved in normal breathing, the external intercostal muscles and the diaphragm.
呼吸既時候，我地總會有小小郁動，代表左呼吸都有肌肉既參與先成事。張圖就比左兩舊正常人正常咁呼吸一定會用到既肌肉：肋間外肌同埋橫隔膜。
Diaphragm is a layer of dome-shaped muscle located between throacic cavity and abdominal cavity.
橫隔膜係一層放鬆既時候向上既圓頂形既肌肉，位於胸腔 (throacic cavity) 同腹腔 (abdominal cavity) 既中間，分開胸腔同腹腔。
External intercostal muscle is subunit of intercostal muscle, responsible for the mechenism of normal breathing, located in between the ribs (Note that another subunit of intercostal muscle called internal intercostal muscle is responsible for forced breathing).
肋間外肌係其中一種肋間肌，主要負責正常呼吸，位於D肋骨之間。(有另外一種肋間肌叫肋間內肌 (internal intercostal muscle) 係o係你要額外呼吸既時候用既)
During ventilation (meaning breathing), air is going in and out of our body. But where's the force coming from? Our body makes the force by a basic physiological mechanism.
呼吸時，空氣中出你既身體。但D力係從邊到黎既呢？空氣又冇腳。
Ventilation can be devided into inhalation (breathe in) and exhalation (breathe out). The whole mechanism runs based on a law of physics - gases moves from high pressured area to low pressured area.
呼吸細分就係吸入 (inhalation) 同呼氣 (exhalation) 。成個呼吸過程推D空氣既力係源自一條物理定律╴氣體由氣壓高既地方走去氣壓低既地方。
Keep in mind that normally, the intrapulmonary pressure is the same as atmospheric pressure.
記得一樣野，如果你咩都唔做，肺內氣壓 (intrapulmonary pressure) 同大氣壓力會係一樣。
不過以後會講到既
patho都成6年前讀