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What is a thin-walled air sac that serves as a site for gas exchange is called?
An alveolus is a single air-sac, and alveoli are multiple air-sacs.
Air travels in what order through the human body?
nose, nasal passageway, pharynx, larynx, trachea, bronchi, bronchial tubes, bronchioles, air sacs, alveol
What passes from the air inside the air sac into the blood?
The main purpose of this is to get oxygen into the cells of the body where it can be used in the process of respiration to generate energy from glucose. Other chemicals such as nicotine can also easily pass through the thin walls of these air sacs (aveoli) as can viruses and microorganisms. Hope that helps Diesel 'Danger' Nutkins
Which parts of the respiratory system divide into smaller and smaller tubes?
The bronchi are passages that direct air into the lungs, which are the main organs of the respiratory system. Inside of the lungs, each bronchus divides into smaller and smaller tubes, resembling the branches of a tree. At the end of the tubes are the alveoli, which are the tiny sacs of lung tissue specialized for the movement of gases between air and blood.
What causes alveolar sacs to fuse together?
Alveolar sacs is the structural unit of lungs.Tiny blood capillaries fuse together to make up an alveolar sac.This structure of the sac is very important for the easy diffusion of respiratory gases across the membrane.
