Credit: Gary M. Stolz, USFWS Savannas are areas of open grassland with very few trees. There are two types of savannas, tropical and semi-tropical savannas. Savannas are typically dry, ... Read More

Image courtesy of MedValet Valves are flap-like structures that allow blood to flow in one direction. The heart has two kinds of valves, atrioventricular and semilunar valves. The atrioventricular ... Read More

With gas prices on the rise, many people are feeling the pain at the pump. With that in mind, researchers have announced that they have discovered a method for converting ... Read More

Hakalau Forest National Wildlife Refuge/USFWS Tropical rain forests are characterized by dense vegetation, seasonally warm temperatures, and abundant rainfall. They are home to the majority of plant and ... Read More

Connective Tissue © Richard Harris / BIODIDAC Connective tissue serves a "connecting" function in the body. It supports and binds other tissues. Connective tissue typically has cells scattered ... Read More

Constructing DNA models is a great way to learn about DNA structure, function, and DNA replication. DNA contains the genetic information for the reproduction of life. Its shape has most often ... Read More

Wolf Spider Sexual cannibalism is a phenomenon that is seen widely among several species of spiders. What is sexual cannibalism? It is an act of cannibalism that occurs ... Read More

The nervous system is responsible for sending, receiving, and interpreting information from all parts of the body. This system can be divided into two parts: the central nervous system (brain ... Read More

Who would have thought that brushing your teeth could actually help prevent heart disease? Studies have shown that there is a link between gum disease and heart disease. Now, researchers ... Read More

SalmonellaCredit: Janice Carr/CDC The U.S. Centers for Disease Control and Prevention (CDC) estimates that around 80 million people a year in the U.S. alone contract food poisoning or ... Read More

© Steve Berg The principles that govern heredity were discovered by a monk named Gregor Mendel in the 1860's. One of these principles, now called Mendel's law of ... Read More

Human anatomy is a popular subject for many biology students. Human anatomy deals with body components and body structure. The human body is organized on various levels. Each of these ... Read More