Editing Cetacea (section)

=== Diving ===
{{see also|Physiology of underwater diving#Mammals}}
While diving, the animals reduce their oxygen consumption by lowering the heart activity and blood circulation; individual organs receive no oxygen during this time. Some [[rorqual]]s can dive for up to 40 minutes, [[sperm whales]] between 60 and 90 minutes and [[bottlenose whale]]s for two hours. Diving depths average about {{convert|100|m|ft|abbr=on}}. Species such as sperm whales can dive to {{convert|3,000|m|ft|abbr=on}}, although more commonly {{convert|1,200|m|ft}}.<ref>{{cite journal|last=Scholander|first=Per Fredrik|title=Experimental investigations on the respiratory function in diving mammals and birds|year=1940|journal=Hvalraadets Skrifter|volume=22}}</ref><ref>{{cite journal|author1=Bruno Cozzi|author2=Paola Bagnoli|author3=Fabio Acocella|author4=Maria Laura Costantino|title=Structure and biomechanical properties of the trachea of the striped dolphin Stenella coeruleoalba: Evidence for evolutionary adaptations to diving|journal=The Anatomical Record|volume=284|issue=1|pages=500–510|year=2005|doi=10.1002/ar.a.20182|pmid=15791584}}</ref>