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...
Ecosystem Succession
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..
Plant Auxins – Phototropism & Geotropism
Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..
Muscle
Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..
Biological Cell Defense
Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..
Genetic Information and Protein Synthesis
Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..
Still Water Animals
Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..