Topics

Variation of organ position in snakes.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Variation of organ position in snakes."

The complex and successful evolutionary history of snakes produced variation in the position and structure of internal organs. Gravity strongly influences hemodynamics, and the impact on structure and function of the cardiovascular system, including pulmonary circulation, is well established. Therefore, we hypothesized that interspecific variation in the position of the heart and vascular (faveolar) lung should exceed that of other internal organs that are less sensitive to gravity. We examined the position of selected internal organs in 72 snakes representing 5 families and 13 species including fully aquatic and scansorial/arboreal species, representing the extremes of gravitational influence. Tests for differences of variance and coefficients of variation largely confirm that interspecific variation in position of the heart and vascular lung generally exceed those of other organs that we measured, particularly posterior organs. The variance of heart position generally exceeded that of more posterior organs, was similar to that of the anterior margin of the vascular lung, and was exceeded by that of the posterior margin of the vascular lung (variance ratio = 0.23). The gravity-sensitive vascular lung exhibited the greatest variation of any organ. Importantly, these findings corroborate previous research demonstrating the influence of gravity on cardiopulmonary morphology. Snakes offer useful model systems to help understand the adaptation of organs to a spectrum of conditions related to diversity of behavior and habitat across a broad range of related taxa.

Affiliation

Journal Details

This article was published in the following journal.

Name: Journal of morphology
ISSN: 1097-4687
Pages:

Links

DeepDyve research library

PubMed Articles [9895 Associated PubMed Articles listed on BioPortfolio]

Venom composition of adult Western Diamondback Rattlesnakes (Crotalus atrox) maintained under controlled diet and environmental conditions shows only minor changes.

Many species of snakes produce venom as a chemical means of procuring potentially fractious prey. Studies have increasingly focused on venom compositional variation between and within individual snake...

Snakes as Novel Biomarkers of Mercury Contamination: A Review.

Mercury (Hg) is an environmental contaminant that has been reported in many wildlife species worldwide. The organic form of Hg bioaccumulates in higher trophic levels, and thus, long-lived predators a...

The diversity, evolution and ecology of Salmonella in venomous snakes.

Reptile-associated Salmonella bacteria are a major, but often neglected cause of both gastrointestinal and bloodstream infection in humans globally. The diversity of Salmonella enterica has not yet be...

Multilocation comparison of fruit composition for 'HoneySweet', an RNAi based plum pox virus resistant plum.

'HoneySweet', a transgenic plum (Prunus domestica) resistant to plum pox virus through RNAi, was deregulated in the U.S. in 2011. The compositional study of 'HoneySweet' fruit was expanded to include ...

Observed variation in soil properties can drive large variation in modeled forest functioning and composition during tropical forest secondary succession.

Censuses of tropical forest plots reveal large variation in biomass and plant composition. This paper evaluates whether such variation can emerge solely from realistic variation in a set of commonly-m...

Clinical Trials [3880 Associated Clinical Trials listed on BioPortfolio]

Pleth Variability Index in Modified Prone Position or Knee-chest Position

Pleth variability index (PVI) is a dynamic variable which be used as a surrogate for intravascular volume status. This study aims to investigate whether PVI predicts the fluid responsiven...

The Blood Pressure Analysis on Critically Ill Patients

The study is to explore the relationship between coefficient of variation of harmonic magnitude (HCV) and different organ failures among those critically ill patients. In the future, we ca...

Efficacy of a New Resurfacing Hip Prosthesis

The purpose of this study is to compare the articular surface replacement (ASR) prosthesis placed by the conventional positioning method and the ASR prosthesis placed by 'computer assisted...

SNAKES Trial: Jelly Snakes to Prevent PONV in Kids After ENT Surgery

Postoperative nausea and vomiting in children is a common phenomenon, particularly after ear nose and throat (ENT) surgery. While it affects up to 80% of patients who do not receive preven...

Monitoring Organ Donors to Increase Transplantation Results (MOnIToR)

The objective of this study is to determine whether protocol guided resuscitation of brain dead organ donors using Pulse Pressure Variation (PPV) will increase the number of organs transpl...

Medical and Biotech [MESH] Definitions

An infraorder of snakes in the order Serpentes that includes all snakes except blind snakes and thread snakes.

The largest family of snakes, comprising five subfamilies: Colubrinae, Natricinae, Homalopsinae, Lycodontinae, and Xenodontinae. They show a great diversity of eating habits, some eating almost anything, others having a specialized diet. They can be oviparous, ovoviviparous, or viviparous. The majority of North American snakes are colubrines. Among the colubrids are king snakes, water moccasins, water snakes, and garter snakes. Some genera are poisonous. (Goin, Goin, and Zug, Introduction to Herpetology, 3d ed, pp321-29)

A family of extremely venomous snakes, comprising coral snakes, cobras, mambas, kraits, and sea snakes. They are widely distributed, being found in the southern United States, South America, Africa, southern Asia, Australia, and the Pacific Islands. The elapids include three subfamilies: Elapinae, Hydrophiinae, and Lauticaudinae. Like the viperids, they have venom fangs in the front part of the upper jaw. The mambas of Africa are the most dangerous of all snakes by virtue of their size, speed, and highly toxic venom. (Goin, Goin, and Zug, Introduction to Herpetology, 3d ed, p329-33)

Elapid snakes indigenous to the Southern United States, Central, and South America. They are generally less than 1 meter in length and have a brightly-colored ringed pattern.

A method of analyzing the variation in utilization of health care in small geographic or demographic areas. It often studies, for example, the usage rates for a given service or procedure in several small areas, documenting the variation among the areas. By comparing high- and low-use areas, the analysis attempts to determine whether there is a pattern to such use and to identify variables that are associated with and contribute to the variation.

Quick Search


DeepDyve research library

Relevant Topics

Pulmonary
Pulmonary relating to or associated with the lungs eg Asthma, chronic bronchitis, emphysema, COPD, Cystic Fibrosis, Influenza,  Lung Cancer, Pneumonia, Pulmonary Arterial Hypertension, Sleep Disorders etc Follow and track Lung Cancer News ...

Cardiovascular disease (CVD)
Acute Coronary Syndromes (ACS) Blood Cardiovascular Dialysis Hypertension Stent Stroke Vascular Cardiovascular disease (CVD) includes all the diseases of the heart and circulation including coronary heart disease (angina...


Searches Linking to this Article