Sinusoids are tiny vessels found in the liver, spleen, and bone marrow. While most other tissues of the body have capillaries that transport blood from the arteries to the veins, ... Read More

Credit: Scott Bauer, USDA/ARS Scientists from the Edgewood Chemical Biological Center believe that they may have identified the pathogens responsible for the mysterious deaths of honeybees. The scientists ... Read More

Gastric function is often classified into three phases. These phases are the cephalic phase, gastric phase, and the intestinal phase. In the cephalic phase, the brain alerts the stomach that ... Read More

Scientists have successfully filmed a bacterial enzyme in the process of eliminating a toxic molecule. The enzyme involved in the study is superoxide reductase. This enzyme removes a toxic molecule ... Read More

The prosencephalon is the largest part of the brain. Also called the forebrain, the prosencephalon consists of the telencephalon (includes the cerebral cortex) and the diencephalon (includes the thalamus and ... Read More

Imagine trying to defend a fortress that is constantly under attack from outside invaders. Now you have an idea of the immense task that our natural defense system must undergo ... Read More

Onion cell in anaphase. © The Entangled Bank Mitosis, a form of cell division, enables organisms to grow and reproduce. Dividing cells go through an ordered series ... Read More

T. rex © Zina Deretsky, National Science Foundation Researchers from North Carolina State University and Harvard Medical School have sequenced protein fragments from the fossils of a ... Read More

The aorta is the largest artery in the body. Arteries are vessels that carry blood away from the heart. The aorta carries and distributes oxygen rich blood to all arteries. With ... Read More

Many biology students often wonder about the meaning of certain biology terms and words. What is a nucleus? What are sister chromatids? What is the cytoskeleton and what does it ... Read More

S. sanguinis. © Lauren Turner/VCU Researchers from Virginia Commonwealth University have successfully decoded the genome of a bacterial organism known as Streptococcus sanguinis. This normally harmless ... Read More

The digestive system is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. Digestion is important because the carbohydrates, proteins, and fats ... Read More