The ventral surfaces of the body incorporate the trunk, stomach area, shins, palms, and soles. [2], The dorsal (from Latin dorsum 'back') surface of an organism refers to the back, or upper side, of an organism. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. The topmost fin of a fish is known as the dorsal fin. [34] For example, the great vessels run centrally through the body; many smaller vessels branch from these. “Dorsal Ventral Body Cavities” By Connexions (CC BY 4.0) via Commons Wikimedia, Lakna, a graduate in Molecular Biology & Biochemistry, is a Molecular Biologist and has a broad and keen interest in the discovery of nature related things, What is the Difference Between Dorsal and Ventral, What are the Similarities Between Dorsal and Ventral, What is the Difference Between Hip and Pelvis. [46] For example, structures may be described relative to the anterior superior iliac spine, the medial malleolus or the medial epicondyle. The outermost side of an ant is its dorsal side, which is covered with the thick cuticle. [1] One reason is that humans have a different neuraxis and another is that unlike animals that rest on four limbs, humans are considered when describing anatomy as being in the standard anatomical position, which is standing up with arms outstretched. For example, structures at the level of the fourth cervical vertebra may be abbreviated as "C4", at the level of the fourth thoracic vertebra "T4", and at the level of the third lumbar vertebra "L3". Several terms are commonly seen and used as prefixes: Other terms are used as suffixes, added to the end of words: Superior (from Latin super 'above') describes what is above something[21] and inferior (from Latin inferus 'below') describes what is below it. Prolateral refers to the surface of a leg that is closest to the anterior end of an arachnid's body. Several other terms are also used to describe location. [45] For this reason, the end of the organism with the mouth is referred to as the oral end (from Latin ōrālis 'of the mouth'),[61] and the opposite surface is the aboral end (from Latin ab- 'away from').[62]. Varus (from Latin 'bow-legged') and valgus (from Latin 'knock-kneed') are terms used to describe a state in which a part further away is abnormally placed towards (varus) or away from (valgus) the midline.[30]. For improved clarity, the directional term palmar (from Latin palma 'palm of the hand') is usually used to describe the front of the hand, and dorsal is the back of the hand. What is the Difference Between Spinal Cord and... What is the Difference Between Thanksgiving and Black Friday, What is the Difference Between Virgin and Extra Virgin Coconut Oil, What is the Difference Between Prosecco Champagne and Sparkling Wine, What is the Difference Between Arrogance and Confidence, What is the Difference Between Grapeseed Oil and Olive Oil, What is the Difference Between Beeswax and Soy Wax. This confusion can arise because the forearm can pronate and supinate. "Lateral", "dorsal", and "ventral" have no meaning in such organisms, and all can be replaced by the generic term peripheral (from Ancient Greek περιφέρεια 'circumference'). The main difference between dorsal and ventral in anatomy is that the term ‘dorsal’ is used to describe the anatomical structures at the back or in the upper side of an organism while the term ‘ventral’ is used to describe the anatomical structures in the front or lower side of the body. [2] Terms of Use and Privacy Policy: Legal. Thus, there are multiple possible radial axes and medio-peripheral (half-) axes. [3], Because animals can change orientation with respect to their environment, and because appendages like limbs and tentacles can change position with respect to the main body, terms to describe position need to refer to an animal when it is in its standard anatomical position. The carapace of a crab is its dorsal side while a bee has its wings on the dorsal side. Similarly, in the forearm, for clarity, the sides are named after the bones. [65] Eyes are labelled according to their position as anterior and posterior lateral eyes (ALE) and (PLE); and anterior and posterior median eyes (AME) and (PME). [1], For humans, one type of vertebrate, and other animals that stand on two feet (bipeds), terms that are used are different from those that stand on four (quadrupeds). Unique terms are used to describe animals without a backbone (invertebrates), because of their wide variety of shapes and symmetry. Vertebrates have a ventral heart, which means that the term can be used to describe the relative position of organs inside bodies. These terms are not used to form the fixed axes. [1][2] Much of this information has been standardised in internationally agreed vocabularies for humans (Terminologia Anatomica)[2] and animals (Nomina Anatomica Veterinaria). Thus, the "rostrocaudal axis" refers to a C shape (see image). (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Moreover, they are important in describing locations of different structures of the body. The genitals are medial to the legs. Some such borrowed terms are widely applicable in most invertebrates; for example proximal, meaning "near" refers to the part of an appendage nearest to where it joins the body, and distal, meaning "standing away from" is used for the part furthest from the point of attachment. The abdomen and/or belly is usually located at the ventral side of an organism, and many important organs and organ systems are found in this region of the body. [65], Aspects of spider anatomy; This aspect shows the mainly prolateral surface of the anterior femora, plus the typical horizontal eye pattern of the Sparassidae, Typical arrangement of eyes in the Lycosidae, with PME being the largest, In the Salticidae the AME are the largest, Standard terms for unambiguous description of relative placement of body parts, "Anterior" redirects here.

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