The spiral valve alternately blocks & unblocks the entrances to the left and right pulmonary arches (sending unoxygenated blood to the skin & lungs). [ http://people.eku.edu/ritchisong/342notes9.html ]

This is just here as a test because I lose it

Term information

id

UBERON:0010018

taxon notes

found in dipnoans and amphibians

The spiral valve is considered to have evolved from the right member of the four embryonic endocardial ridges (Goodrich, 1930 - via Morris 1974)

Term relations