one-chambered

Nature tends to be conservative, keeping the “scaffolding” in one form or another, such as the yolk sac or the one-chambered heart or the primitive tail we all had while in the womb.

THE HIDDEN FACE OF GOD GERALD L. SCHROEDER 2001

Nature tends to be conservative, keeping the “scaffolding” in one form or another, such as the yolk sac or the one-chambered heart or the primitive tail we all had while in the womb.

THE HIDDEN FACE OF GOD GERALD L. SCHROEDER 2001

The heart consists at first of one chamber only, recalling the one-chambered heart of Crustacea.

Form and Function A Contribution to the History of Animal Morphology

In the first place the city council was simplified and made a one-chambered council consisting of nineteen aldermen.

Civil Government in the United States Considered with Some Reference to Its Origins John Fiske 1871

When introduced to each other, the three cells types spontaneously self-organized, clumping together to form something resembling a one-chambered heart.

The Seattle Times 2011

If the plan goes forward, Maine would become only the second state, behind Nebraska, to have a one-chambered legislature.

Freakonomics 2009

We’ve changed from a tail-bearing organism immersed in liquid with eyes on the sides of our heads, a yolk sac, bronchial arches, a one-chambered heart, a snout-like nose, with webbed hands and feet, and become human.

THE HIDDEN FACE OF GOD GERALD L. SCHROEDER 2001

We’ve changed from a tail-bearing organism immersed in liquid with eyes on the sides of our heads, a yolk sac, bronchial arches, a one-chambered heart, a snout-like nose, with webbed hands and feet, and become human.

THE HIDDEN FACE OF GOD GERALD L. SCHROEDER 2001

We may assume that the Acrania that really belong to our ancestral series did not share this retrogression, but inherited the one-chambered heart of the Prochordonia, and transmitted it directly to the earliest Craniotes (cf. the ideal Primitive Vertebrate,

The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876