Skin is the first line of defense mechanism of our immune system. It acts as a barrier for pathogenic and opportunistic microorganisms. However, skin itself has a microbiota that does not allow other microorganisms to invade or colonize. Any wound, cut or change in the pH of skin due to environmental conditions or any disease might lead to the entry of the opportunistic microorganisms inside the skin. This leads to several skin disorders such as dermatitis, eczema, cellulitis, warts, etc. Thus, it is extremely important to keep the skin hydrated and healthy to avoid any kind of microbial invasion.
Vitamin b12 is the most popular deficiency at the moment- B12 creates red blood cells which travels oxygen around the body- having B12 deficiency can lead to anaemia.
This would be enzymes made of proteins.
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The main function of the smooth ER is to make hormones and lipids.
A unicellular organisms only has ONE cell
