can someone help me explain to my 10 year old sister how oxygen gets into the blood stream?

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can someone help me explain to my 10 year old sister how oxygen gets into the blood stream?

2007-10-02 16:38:21 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Biology

2 answers

When we breathe air into our lungs, the air travels through tubes that branch into smaller and smaller and smaller tubes. The smallest tubes end in little moist air sacs. The oxygen dissolves into the moisture in the air sacs and travels right through them into the capillaries. Once in the blood stream, the oxygen is picked up by hemoglobin molecules in the red blood cells.

2007-10-02 16:43:23 · answer #1 · answered by ecolink 7 · 1⤊ 0⤋

sure...actually the blood gets oxygenated in the heart...just say when you breathe air, your heart puts the oxygen in the air into your blood

2007-10-02 16:50:25 · answer #2 · answered by Michael M 1 · 0⤊ 3⤋