Final answer:
A hollow tube that carries oxygen to the nostrils is called a nasal cannula. It is a device commonly used for oxygen therapy.
Step-by-step explanation:
A hollow tube that carries oxygen to the nostrils is called a nasal cannula. It is a device commonly used for oxygen therapy, which delivers a controlled amount of oxygen to a patient's nose to help with breathing. The nasal cannula is lightweight and consists of two small prongs that fit into the nostrils and are connected to the oxygen source through a flexible tubing.
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