Respiratory System Worksheet

smaller and narrower tubes
moves into the lungs, which is picked up by blood cells and taken to every part of the body.
Movement of air into and out of the lungs
The trachea splits into how many tubes before entering the lungs.
Once the oxygen is used, it binds with the ______ and then returned to the _______so it can be expelled.
During exhalation, the diaphragm ________and moves_________ reducing the space around the lungs and air pressure in the chest increases.
large muscles below the lungs which makes up the floor of the thoracic cavity, which is the cavity that holds the lungs.
The two tubes that branch off from the trachea and enter the lungs.
During inhalation, the diaphragm_______and moves_____ enlarging the space around the lungs, reducing air pressure inside the chest.
Microscopic sacs at the end of each bronchiole; site of gas exchange
Breathe out
Breathe in
windpipe tube that connects the pharynx to the lungs
called the voicebox
a tubelike passageway at the top of the throat that receives air, food, and liquids from the mouth or nose.