Structure of Lungs | Class 10th | CBSE Let's break it down less than 5 mi скачать в хорошем качестве

Structure of Lungs | Class 10th | CBSE Let's break it down less than 5 mi

#sciencebysumati The lungs are a pair of spongy, air-filled organs in the chest that facilitate breathing, with the right lung having three lobes and the left lung having two. Air enters through the trachea, which splits into bronchi, then bronchioles, ending in tiny air sacs called alveoli where gas exchange occurs.  Here's a more detailed breakdown of the lung structure: Key Structures: Trachea (Windpipe): A large tube that carries air from the nose and mouth to the lungs.  Bronchi: The trachea splits into two main bronchi, one leading to each lung.  Bronchioles: The bronchi branch into smaller tubes called bronchioles.  Alveoli: Tiny air sacs at the end of the bronchioles where gas exchange (oxygen and carbon dioxide) takes place.  Pleura: A double-layered membrane that surrounds the lungs, reducing friction during breathing.  Diaphragm: A muscle that separates the chest cavity from the abdominal cavity and plays a key role in breathing.  Rib Cage: Protects the lungs and other organs in the chest.  Lungs: The right lung has three lobes (upper, middle, and lower), while the left lung has two lobes (upper and lower).  Cardiac Notch: An indentation in the left lung that accommodates the heart.  Apex: The top, narrow part of the lungs.  Base: The bottom, broad part of the lungs, resting on the diaphragm.  Surfaces: The lungs have three surfaces: costal (facing the ribs), mediastinal (facing the heart), and diaphragmatic (facing the diaphragm).  Borders: The lungs have three borders: anterior, posterior, and inferior.