Human Respiratory System And Gas Exchange — a labelled NEET Biology diagram with a definitions lexicon.
Human Respiratory System and Gas Exchange Labelled parts: Nasal cavity, Pharynx, Larynx, Trachea (C-shaped cartilage rings), Bronchi, Bronchioles, Alveoli, Diaphragm, Capillary network, Thin squamous epithelium, Inspiration, Expiration, Oxygen (O2), Carbon Dioxide (CO2), Oxygenated capillary (O2 high, CO2 low), Deoxygenated capillary (CO2 high, O2 low), Air enters, Air exits. These rings are found in the trachea and bronchi, providing structural support to keep the airways open. The C-shape allows the trachea to expand during breathing while maintaining patency. FYI: The cartilage rings prevent the collapse of the respiratory passages during negative pressure created during inhalation. This is a type of simple epithelium characterized by flattened, scale-like cells. It is found in areas requiring rapid diffusion, such as the lining of blood vessels and alveoli. FYI: The thinness of the squamous epithelium in the alveoli minimizes the diffusion distance, facilitating efficient gas exchange. The process by which respiratory gases (O₂ and CO₂) move between the external environment and the blood. In humans, this occurs primarily across the alveolar membranes. FYI: Gas exchange relies on the partial pressure gradient; gases move from an area of higher partial pressure to an area of lower partial pressure.