Dictionary > Head

Head

Definition
noun, plural: heads
(1) The cephalic part of an organism, especially the body part containing the brain and/or most organs used for feeding and/or sensing
(2) The topmost part of an object
Supplement
In most animals and humans, the head is the uppermost part of the body where brain, eyes, ears, nose, and mouth are located. The human head (relative to body) is regarded as the largest among other animals.
In some animals, the head is not found on the topmost (anterior) part of their body. For instance, the squids have head-foot in which their arms and tentacles are located. Other animals such as sea stars have no distinctive head. Sea stars have eyespots at the tip of the arms, mouth at the center, and no centralized brain.
Related term(s):

See also:

  • cephalic


  • You will also like...

    Transpiration
    Water in Plants

    The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

    Plant Auxins
    Plant Auxins – Phototropism & Geotropism

    Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

    Cells in different stages of meiosis
    Meiosis – The Genetics of Reproduction

    Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..

    Plant Water Regulation
    Plant Water Regulation

    Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

    Still Water Community Plants
    Still Water Community Plants

    This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

    dinosaurs
    The Dinosaurs

    Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..