secretions that are normally released into the digestive tract necessary for digestion.
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K
Filter the blood.
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L
Starts with
M
Is an extensive plateau that convers the centre of the Iberian Peninsula.
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N
Pass into the body cells.
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O
It is opposite of carbon dioxide.
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P
Transport nutriens.
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R
Carry oxygen from the lungs to all the body cells.
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S
Blood flows between the heart .
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T
Respiratory duct of the vertebrates, formed by cartilaginous rings, which begins in the larynx and descends in front of the esophagus to the middle of the chest, where it forks forming the bronchi.
