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keyword

when you breathe in oxygen what comes out

Monthly search volume and cost-per-click data for "when you breathe in oxygen what comes out" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=when+you+breathe+in+oxygen+what+comes+out&country=us" +--------------+------------------+ | volume | 260 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-03-31 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
what does the respiratory system do 4,400 $0 17/20
human lungs 4,400 $0.08 15/20
human respiratory system 2,400 $0 15/20
respiratory system human 2,400 $0 15/20
what do we breathe out 2,400 $0 15/20
how does the respiratory system work 1,900 $6.92 17/20
in the lungs 1,900 $0 15/20
what is the lungs 1,600 $0 17/20
what do the lungs do 1,600 $0 15/20
lungs in the body 1,300 $0.08 16/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=when+you+breathe+in+oxygen+what+comes+out&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt