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..
Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..
Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics – Definition: Heredity and ..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..
Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..
