bittersweet13
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Why would it be a disadvantage to have a stratified squamous epithelial in the lining of the heart?
Which consists primarily of simple squamous epithelial.
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h3rmit
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(Original post by bittersweet13)
Why would it be a disadvantage to have a stratified squamous epithelial in the lining of the heart?
Which consists primarily of simple squamous epithelial.
One of the main purposes of squamous epithelial cells is for rapid diffusion/osmosis due to a short diffusion/osmosis distance. Putting lots of squamous cells on top of each other for a stratified lining counteracts that purpose, making the diffusion of glucose and oxygen in/CO2 out slower, which is a very Bad Thing for a muscle that's working continuously, as you get more anaerobic respiration (less ATP per glucose), which could then lead to some contractions not being able to happen, despite the impulse. This would probably manifest itself in missed heartbeats, or your heart locking in a contractile state as the myosin heads have to hydrolyse ATP to revert. You would also get higher acidity due to more carbonic acid, which at very, very, very extreme levels could disrupt the hydrogen and ionic bonds of the proteins in your heart (actin, myosin, collagen etc.) weakening your heart's muscles and weakening the heart itself.
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Reality Check
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NB: the simple epithelial tissue which lines the heart and vascular system's vessels is known specifically as endothelium.
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