12 results found

Search Results for: blood-brain barrier

Definition noun A semipermeable membrane that serves as a selective barrier separating the circulating blood and the... Read More

What are tight junctions? Tight junctions are the intercellular barrier between two neighboring endothelial and epithelial... Read More

Nervous Tissue Definition Nerve cells (or neurons) and their associated cells, such as neuroglia cells, make up nervous... Read More

What is the Glycocalyx? The glycocalyx is a polysaccharide-based gel-like, highly hydrous cellular thin layer, covering... Read More

Nerve cells called neurons generate electric signals that pass from one end of the cell to another and release chemical... Read More

Definition noun, plural: dopamines 3,4-dihydroxyphenethylamine (chemical formula: C8H11NO2); a neurotransmitter or a hormone... Read More

Parenchyma Definition What does parenchyma mean? Let's define the word "parenchyma". Most of the functional tissues in... Read More

Definition Of Organ An organ is a collection of tissues that carries out a function or set of related ones. An organ often... Read More

Definition noun plural: mannitols man·ni·tol, ˈmæn ɪˌtɔl A sugar alcohol with a sweetish taste, occurs naturally in... Read More

Anatomy Definition Often we hear the term 'anatomy' while learning about the body and how it works. What is anatomy? What... Read More

Muscular System Definition What is the muscular system? The muscular system is a system that includes muscle cells and... Read More

It only takes one biological cell to create an organism. In fact, there are countless species of single-celled organisms,... Read More