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Primary 3 | Maths
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Pls help. Tks
Date Posted: 4 years ago
Views: 333
Y: circulatory [heart to lungs]
(oxygenated blood travels to organs and tissues in exchanged for carbn dioxide)
X: respiratory [lungs to heart]
(deoxygenated blood passes carbon dioxide to lungs in exchange for fresh oxygen)
.
(oxygenated blood travels to organs and tissues in exchanged for carbn dioxide)
X: respiratory [lungs to heart]
(deoxygenated blood passes carbon dioxide to lungs in exchange for fresh oxygen)
.
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4.
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