Microscopy Primer
Light and Color
Microscope Basics
Special Techniques
Digital Imaging
Confocal Microscopy
Live-Cell Imaging
Photomicrography
Microscopy Museum
Virtual Microscopy
Fluorescence
Web Resources
License Info
Image Use
Custom Photos
Partners
Site Info
Contact Us
Publications
Home

The Galleries:

Photo Gallery
Silicon Zoo
Pharmaceuticals
Chip Shots
Phytochemicals
DNA Gallery
Microscapes
Vitamins
Amino Acids
Birthstones
Religion Collection
Pesticides
BeerShots
Cocktail Collection
Screen Savers
Win Wallpaper
Mac Wallpaper
Movie Gallery

Differential Interference Contrast Image Gallery

Frog Heart Muscle Tissue

Frogs are tailless amphibians that belong to the order Anura. Species of frog may vary greatly in size, behavior, and habitat, but they all have something in common; the same kind of blood and the same type of heart that pumps it through their bodies.

Unlike most mammalian species, frogs and other amphibians possess nucleated blood cells, which is an indication of their less evolved nature. Moreover, their circulatory systems feature a heart that has only three chambers, rather than the four possessed by humans and other more advanced species. The combination of two atria and a single ventricle complicates circulation because blood returning to the heart from the lungs is combined with incoming blood from the body, resulting in mixing between oxygenated and deoxygenated blood. Frogs handle this situation, however, by having a very slow metabolism and by absorbing some oxygen through their skin. There is also some directional control of the distribution of blood flow by the ventricle.

In order to carry out their daily activities, frogs depend upon three types of muscle; striated (skeletal), cardiac (heart), and smooth. Striated muscles are composed of elongated fibers and are used for actions such as hopping. As indicated by the name, the tissue exhibits striped or striated patterns when examined under a microscope. Smooth muscle cells, on the other hand, are usually smaller than striated ones and have a distinctly different appearance. Allied with autonomic or involuntary systems, smooth muscle tissues can be found in the digestive system, the blood vessels, and a large number of the internal organs. Cardiac muscle, however, is a highly specialized component of the heart, which appears similar to striated muscle, but functions involuntarily in a manner comparable to smooth muscle.

BACK TO THE DIC IMAGE GALLERY

Questions or comments? Send us an email.
© 1998-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Friday, Aug 01, 2003 at 11:43 AM
Access Count Since April 22, 2003: 23870
For more information on microscope manufacturers,
use the buttons below to navigate to their websites: