The Pacific hagfish is the only vertebrate that can obey the cardinal rule of the dinner table: don’t eat with your mouth open. Uniquely among the 50,000 vertebrate species alive today, it can ...

The diversity of vertebrate feeding systems / Kurt Schwenk and Margaret Rubega -- Concepts of digestive efficiency / Ian D. Hume -- Carbohydrate hydrolysis and absorption : lessons from modeling ...

Innate immunity has a long phylogenetic history, encompassing species as diverse as sea anemones, insects and mammals. By contrast, adaptive immunity, which involves lymphocyte-like cells and the ...

The sympathetic nervous system, which enables the fight-or-flight response, was thought to be present only in jawed vertebrates. Analysis of a jawless vertebrate suggests that this system might be a ...