The Importance of Columnar Cells in the Immune System

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The bigger the volume inside, the greater the capacity to produce something for secretion or to deal with something that's being absorbed. If it's squamous, then you can't create a concentration gradient. It's not necessarily going to be doing a lot of producing mucus or fluids because it's not big enough. And that's where the column now come in. So the column is going to be able to deal with things on the inside a little bit better. The reason for doing this is it's part of the innate immune system. Because we're breathing in the outside world effectively, we could be breathing in all sorts of toxic or problematic substances.

One of the four tissue types of the body, epithelia lines and protects our organs from the external and internal environment. In this episode, Dr Matt & Dr Mike explain how the different shape and layers of epithelia tell you what function it performs (form = functions) and highlight examples in the body where you can find each type. They also explore cancer, metaplasia, dysplasia, and Dr Matt's mums skin cancer diagnosis and surgery.

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