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RepiratorySystem dp4

Seb - Structures and Functions of the Respiratory System

Trachea The long tube connecting the pharynx, mouth and nasal cavities to the bronchi. Several rings of cartilage along the tube.This prevents it from collapsing. This provides support during inhalation, when there is negative pressure in the lungs.
Bronchi Connect the trachea to the lungs. Two going to each lung, with the same cartilage rings for support (essentially prevents bending). Support when there is negative pressure in the lungs.
Alveoli Bronchi --> Bronchi-oles -->terminate into the gaseous exchange zone of the lung, the alveoli. Walls are moist, allowing for gases to dissolve and move easily from inside the alveoli to the blood capillaries that surround the alveoli. Regulation of O2.
Capillary Network around the Alveoli Capillaries are fine blood vessels that transport oxygen-rich blood from the lungs to the pulmonary vein and oxygen-depleted blood from the " " artery to the lungs for exhalation. Surround each alveolus, maximising surface area.
Oxygen Pathway (description) Oxygen travels through the trachea and bronchioles towards the alveolus and dissolves in the cells of the moist alveolar wall, moving through the wall into the capillary network and subsequently the pulmonary artery, and rest of body.
Created by: MCESeniorScience