Onion cell in metaphase. © The Entangled Bank Mitosis is a process of cell division in which the genetic material from a parent cell is divided equally ... Read More

The fourth ventricle is a diamond shaped cavity located behind the pons and medulla oblongata. It is part of the ventricular system of the brain. The fourth ventricle helps to protect the ... Read More

Proteins are very important molecules in our cells. They are involved in virtually all cell functions. Each protein within the body has a specific function. Some proteins are involved in ... Read More

Nicole Rager-Fuller, NSF Scientists from the University of Chicago have developed a model that can successfully predict when and where blood clotting will occur. Blood clotting is necessary ... Read More

The choroid plexus is the area of the brain where cerebrospinal fluid is produced. It contains a capillary bed, pia mater (meninges), and choroid ependymal cells. The ependymal cells help to ... Read More

The endoplasmic reticulum (ER) is an extensive network of membranes composed of both regions with ribosomes (rough ER) and regions without ribosomes (smooth ER). The two regions of the ER ... Read More

Boreal Forest in CaliforniaBlake, Tupper Ansel (USFWS) Biomes are the world's major habitats. These habitats are identified by the vegetation and animals that populate them. The location ... Read More

Diffusion is the tendency of molecules to spread into an available space. Without other outside forces at work, substances will diffuse from a more concentrated environment to a less concentrated ... Read More

Researchers from MIT and Hong Kong University have developed a biodegradable liquid substance that can seal open wounds in mere seconds. The liquid substance is a solution that contains peptides, ... Read More

Sister chromatids are two identical copies of a single chromosome that are connected by a centromere. In anaphase, for example, the sister chromatids separate and begin moving to opposite ends of ... Read More

Researchers have long attempted to elucidate the role that viruses play in cancer. There is a mountain of circumstantial evidence that viruses can cause certain types of cancer. At the same ... Read More

Courtesy Peter H. Niewiarowski In a study published in The American Naturalist, researchers have determined that animals in colder environments produce bigger offspring than those in warmer environments. ... Read More