Biology

Lymphatic System Definition: Lymphatic System is a collection of organs, tissues, ducts, and vessels that help to make or transport lymph. Lymph is a clear-to-white…

Vitex Peduncularis Plant Vitex is a genus of about 250 species of shrubs and trees from 1-35 m tall, native to tropical, subtropical and also…

Active Transport Definition Active transport is the movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is,…

Potassium Channel Definition Potassium channels are designed to allow the flow of potassium ions across the membrane but to block the flow of other ions–in…

Endothelium Definition The endothelium is a thin layer of flat cells lining the closed internal spaces of the body such as the inside of blood…

Microglia Definition Microglia is any of the small neuroglial cells of the central nervous system (CNS) having long processes and ameboid and phagocytic activity at…

Subthalamic Nucleus Definition Subthalamic nucleus is a circumscript nucleus that is located in the ventral part of the subthalamus, receives a massive projection from the…

Basal Ganglia Definition Basal ganglia are a region of the base of the brain that consists of three clusters of neurons that are responsible for…

Striatum Definition Striatum is a subcortical part of the forebrain and a critical component of the reward system. It is also known as the neostriatum…

Premotor Cortex Definition Premotor cortex is an area of the brain located directly behind the prefrontal cortex that plays an important role in motor planning.…

Motor Cortex Definition Motor cortex is the region of the cerebral cortex influencing movements of the face, neck and trunk, and arm and leg. It…

Corpus Callosum Definition Corpus callosum is the transverse band of nerve fibers that connects the right and left cerebral hemispheres. It is also called callosal…