seodata.dev

keyword

what do humans breathe in and out

Monthly search volume and cost-per-click data for "what do humans breathe in and out" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=what+do+humans+breathe+in+and+out&country=us" +--------------+------------------+ | volume | 1,900 | | 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
lungs parts 3,600 $2.5 17/20
human breathing system 2,400 $0 20/20
what do we breathe out 2,400 $0 20/20
human respiratory system 2,400 $0 17/20
respiratory system human 2,400 $0 17/20
how does respiration work 1,900 $14.1 19/20
how does the respiratory system work 1,900 $6.92 18/20
what is lungs 1,600 $0 16/20
what do we inhale 90 $0 17/20

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=what+do+humans+breathe+in+and+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