____________ from the air enters the alveolus.
Oxygen
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The ________ are located inside the ribcage.
lungs
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They carry blood from the heart around the body.
arteries
The urinary tract is made up of the u________ and the u__________.
ureters and urethra
This tube carries the urine from the bladder to the outside of the body.
urethra
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The alveoli are surrounded by _________.
blood vessels
They are thin blood vessels that reach all cells.
capillaries
The muscular bag that expands to store urine is called the ________.
bladder
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A gas exchange occurs during the process of respiration between ________ and _______________.
oxygen and carbon dioxide
The trachea has two branches called _________ that are divided into smaller ________________.
bronchi, bronchioles.
They carry blood from the body to the heart.
veins
These bean-shaped organs located at the back of the abdomen help produce urine.
kidneys
The pulmonary veins carry oxygen from the ______ to the _________.
lungs to the heart
Carbon dioxide in the blood passes into the _____________.
alveolus.
What part of the airways contain the vocal cords?
Larynx
When the skin is wounded, _______ form a clot to stop the bleeding.
platelets
The skin contains glands that produce _______ to eliminate waste.
sweat
This organ filters blood from toxins.
Liver
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