Dictionary > Coelom

Coelom

Definition
noun, plural: coeloms
(1) A fluid-filled body cavity formed from the splitting of lateral plate mesoderm during embryonic development
(2) A body cavity
Supplement
Animals may be grouped based on the coelom:

Coelom is a crucial step in evolution since a complicated body plan would benefit from it. A coelom allows compartmentalization to separate biological systems that carry out differing major functions. For instance, animals without coelom (acoelomates) would have to rely on diffusion to transport nutrients around the body. Since acoelomates (such as flatworms) are relatively small and have less intricate body plan (flat), diffusion is enough to carry out transport function. However, for animals (such as mammals) that have complicated body plans would need other transport system (circulatory system) apart from diffusion. A coelom would therefore be useful to separate circulatory system from abdominal organs that carry out a different major function (which is digestion). Thus, both of these systems can perform their function separately and with more efficiency. Coelom also allows organs to grow and change in position or shape.
Word origin: Greek koilōma (cavity)
Also called:

Mentioned in:

  • Abdominal cavity


  • You will also like...

    Early Mammals on Earth
    Early Mammals on Earth

    The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

    Physiological Homeostasis
    Physiological Homeostasis

    Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    Salmon jumping upstream in the river
    Lotic Communities & Animals

    A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

    Kidneys
    Kidneys and Regulation of Water and Inorganic Ions

    The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

    "Cronopio dentiacutus", a prehistoric mammal (an illustration)
    Mammalian Ancestors

    Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..