organism, an organ is a collection of tissues joined in a structural unit to serve a common function. In the hierarchy of life, an organ lies between...

In biology, the electric organ is an organ that an electric fish uses to create an electric field. Electric organs are derived from modified muscle or...

A sex organ, also known as a reproductive organ, is a part of an organism that is involved in sexual reproduction. Sex organs constitute the primary sex...

– organ – organ system – organism – population – community – ecosystem – biosphere Approach: Reductionism – emergent property – mechanistic Biology as...

(2005) Henderson's Dictionary of Biology. Pearson, Prentice Hall. ISBN 0-13-127384-1. Muller, G. B. (2002) "Vestigial Organs and Structures". in Encyclopedia...

Look up organ in Wiktionary, the free dictionary. Organ and organs may refer to: Organ (biology), a group of tissues organized to serve a common function...

intromittent organ is any external organ of a male organism that is specialized to deliver sperm during copulation. Intromittent organs are found most...

specialized sex organs to assist the transport of sperm—these male sex organs are called intromittent organs. In humans and other mammals, this male organ is known...

The vomeronasal organ (VNO), or Jacobson's organ, is the paired auxiliary olfactory (smell) sense organ located in the soft tissue of the nasal septum...

Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single,...

derived from the same ancestral tetrapod structure. In developmental biology, organs that developed in the embryo in the same manner and from similar origins...

their organ systems are into distinct regions or sub-organs—with a distinct type of construction, which is to say a particular layout of organ systems...

heads (cranial kinesis). To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side...

legs, wings, arms, fins, or tails are sometimes referred to as locomotory organs or locomotory structures. The term "locomotion" is formed in English from...

Light-sensitive organs that evaginate from the diencephalon - NCBI Zug, George; Vitt, Laurie Vitt; Caldwell, Janalee (2002). Herpetology: An introductory biology of...

more vital functions, analogous to the organs of the human body (such as the heart, lung, and kidney, with each organ performing a different function). Both...

photoreceptors, chemoreceptors, thermoreceptors) in sensory organs transduct sensory information from these organs towards the central nervous system, finally arriving...

employing liquid medium. Organ culture technology has contributed to advances in embryology, inflammation, cancer, and stem cell biology research. In April...

(/praɪˈmɔːrdiəm/; pl.: primordia; synonym: anlage), in embryology, is an organ or tissue in its earliest recognizable stage of development. Cells of the...

species of amphibians and reptiles, the gland is linked to a light-sensing organ, variously called the parietal eye, the pineal eye or the third eye. Reconstruction...

electric fish". Journal of Experimental Biology, 202 (10): 1205–1215. Full text Kramer, Bernd (2008). "Electric Organ Discharge". In Marc D. Binder; Nobutaka...

biological organizational level between cells and a complete organ. Accordingly, organs are formed by the functional grouping together of multiple tissues...

hierarchical organization, spanning from molecular machines to cells, organs, tissues, organisms, populations, ecosystems, up to the whole biosphere...

A stinger (or sting) is a sharp organ found in various animals (typically insects and other arthropods) capable of injecting venom, usually by piercing...

2012). The Biology of the Monotremes. Elsevier Science. ISBN 978-0-323-15331-7. Grützner, F.; Nixon, B.; Jones, R.C. (2008). "Reproductive biology in egg-laying...

Involution is the shrinking or return of an organ to a former size. At a cellular level, involution is characterized by the process of proteolysis of...

sex organ through which male and hermaphrodite animals expel semen, and through which male placental mammals and marsupials also urinate. This organ is...

A gill (/ɡɪl/ ) is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills...

Journal of Evolutionary Biology. 31 (5). Hoboken, NJ: Wiley-Blackwell on behalf of the European Society for Evolutionary Biology: 701–709. doi:10.1111/jeb...

Aristotle's biology is the theory of biology, grounded in systematic observation and collection of data, mainly zoological, embodied in Aristotle's books...