Related Experiment Video
Updated: Mar 7, 2026

Dissection of Organizer and Animal Pole Explants from Xenopus laevis Embryos and Assembly of a Cell Adhesion Assay
Published on: April 29, 2007
Organ or not? prolegomenon to organology
1Department of Medical Neuroscience, Dalhousie University, Halifax, Nova Scotia, Canada.
Abstract:
The definition of an organ is vague, so that listing and classifying human organs is problematic. The classical Greek definition of an organ as an instrumental part of the body has been supplemented in modern biology by stating that organs occupy a hierarchical level between systems and tissues. Not all anatomical entities on that level meet the requirement of a special function. Thus it appears that systems are composed of organs and connecting (or linking) structures, such as some connective tissues, various tubular entities, and nerves. Clin. Anat. 30:288-289, 2017. © 2017 Wiley Periodicals, Inc.
Related Concept Videos
Structural Organization of the Human Body: An Overview
To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms, and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of...
Overview of Anatomy and Physiology
Anatomical Terminology
Levels of Organization
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
Structuralism
Titchener's approach to structuralism was unique. He...
Accessory Organs

