With approximately 7000 species, snakes and lizards, collectively known as squamates, are
by far the most species‐rich group of reptiles. It was from reptile‐like ancestors that …

Birds and mammals both developed high performance hearts from a heart that must have
been reptile-like and the hearts of extant reptiles have an unmatched variability in design …

The hearts of all snakes and lizards consist of two atria and a single incompletely divided
ventricle. In general, the squamate ventricle is subdivided into three chambers: cavum …

The multiple convergent evolution of high systemic blood pressure among terrestrial
vertebrates has always been accompanied by lowered pulmonary pressure. In mammals …

Consistent with the great variation in their circulatory morphology, there are distinct
variations in the cardiovascular physiology of extant reptiles. The chelonian and squamate …

Differences between hearts of crocodilians and those of mammals and birds are only partly
understood because there is no standardised approach and terminology for describing …

The elongate body form of snakes and the wide diversity of habitats into which they have
radiated have affected the form and function of the cardiovascular system. Heart position is …

A chambered heart is common to all vertebrates, but reptiles show unparalleled variation in
ventricular septation, ranging from almost absent in tuataras to full in crocodilians. Because …

Brightness‐modulated ultrasonography, continuous‐wave Doppler, and pulsed‐wave
Doppler‐echocardiography were used to analyze the functional morphology of the …

The heart of non-crocodilian reptiles has two separate atria that receive blood from the
systemic and pulmonary circulations. The ventricle is not fully divided, but is …