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Blowhole (anatomy)
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In cetology, the study of whales and other cetaceans, a blowhole is the hole (or spiracle) at the top of the head through which the animal breathes air. In baleen whales, these are in pairs. It is homologous with the nostril of other mammals, and evolved via gradual movement of the nostrils to the top of the head.[1] The posterior placement of blowholes on cetacean heads is believed to minimize the energy used when breathing at the water's surface.[2]
- ^ "Whale evolution: The blowhole". 18 March 2008.
- ^ Reidenberg, Joy S.; Laitman, Jeffrey T. (2008). "Sisters of the Sinuses: Cetacean Air Sacs". The Anatomical Record. 291 (11): 1389–1396. doi:10.1002/ar.20792. ISSN 1932-8494. PMID 18951477. S2CID 39634203.
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