Regina's Biology Blog May 2005 Archive

Nodal tissue is a specialized type of tissue that functions as both muscle and nervous tissue. Nodal tissue contracts like muscle tissue and generates nerve impulses like nervous tissue.

Strep throat may be linked to obsessive compulsive disorder (OCD). The linkage appears to be rare, affecting about one in 1000 children. Doctors think that antibodies created during the infection ... Read More

Researchers have discovered an active underwater volcano with a unique biological community of eels in the surrounding area.

The main pulmonary artery carries de-oxygenated blood from the heart to the lungs. It extends from the right ventricle and branches into left and right pulmonary arteries.

Scientists at the National Zoo have developed a new process of determining gender through DNA analysis. By analyzing the DNA in the quills of a newborn porcupine, they were able ... Read More

How would you like to make a model of a neuron using Jell-O or watch the color of a bird change before your eyes? Take a look at some super ... Read More

The aorta is the largest artery in the body. With the exception of the main pulmonary artery, most major arteries branch off from the aorta.

Using electrode implants, researchers have enabled monkeys to control a robotic arm with brain power.

The Wildlife Conservation Society reports that a new rodent species has been discovered in Laos. Using bone structure and DNA analysis, researchers estimate that this new species diverged from other ... Read More

The vena cavae are the two largest veins in the body. The superior and inferior vena cavae direct blood from various parts of the body to the right atrium of ... Read More

Researchers have discovered the remains of a plant-eating dinosaur in Utah. Named Falcarius utahensis, this animal is thought to have been a transitional species that was evolving from a meat-eater ... Read More

Organisms need energy to survive. Some organisms are capable of absorbing energy from sunlight and using it to produce sugar and other organic compounds such as lipids and proteins. This ... Read More

The pericardium is the fluid filled sac that surrounds the heart. It keeps the heart contained within the chest cavity and prevents the heart from over-expanding when blood volume increases.