Leptocardia
(Science: zoology) The lowest class of vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colourless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus.
alternative forms: Leptocardii.
Origin: NL, fr. Gr. Small – the heart.
Leptocardia (Science: zoology) The lowest class of vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colourless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus. alternative forms: Leptocardii. Origin: NL, fr. Gr. Small..
Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..
