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.
Dictionary > Leptocardia
You will also like...
Biosecurity and Biocontrol
This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..
Examples of Natural Selection
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
A Balanced Diet – Minerals and Proteins
Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..
Sugar Homeostasis
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..
Dominance
This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..
Freshwater Communities & Plankton
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..