Lobes:
* Right Lung: The right lung is larger than the left and has four lobes:
* Cranial Lobe: The topmost lobe.
* Middle Lobe: Sits between the cranial and caudal lobes.
* Caudal Lobe: The largest lobe, located at the bottom.
* Accessory Lobe: A small, separate lobe.
* Left Lung: The left lung is smaller and has only three lobes:
* Cranial Lobe: Similar to the right lung's cranial lobe.
* Caudal Lobe: The largest lobe of the left lung.
* Accessory Lobe: A small, separate lobe.
Trachea & Bronchi:
* Trachea: The windpipe, a tube that carries air from the nose and mouth to the lungs.
* Bronchi: The trachea divides into two main bronchi, one for each lung. These bronchi continue to branch into smaller and smaller tubes (bronchioles) within the lungs.
Alveoli:
* Alveoli: These tiny air sacs are the functional units of the lungs. They are clustered at the ends of the bronchioles and are where gas exchange takes place. Oxygen from the inhaled air diffuses into the blood, and carbon dioxide from the blood diffuses into the alveoli to be exhaled.
Overall Arrangement:
The lungs are enclosed in the chest cavity, surrounded by the ribcage. The diaphragm, a sheet of muscle, separates the chest cavity from the abdominal cavity. This arrangement allows the lungs to expand and contract during breathing.
Key Points:
* Pig lungs are divided into lobes.
* The right lung has four lobes; the left has three.
* Air travels from the trachea to the lungs via bronchi.
* The alveoli are the sites of gas exchange.
This description should give you a good understanding of the arrangement of pig lungs. If you have any further questions, feel free to ask!