What tree show us an example meyn
The blood flows through the vessels of the heart to keep it going
Antigens are substances capable of mobilizing the<u> </u><u>IMMUNE SYSTEM</u>
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<u>Your answer would be: </u> IMMUNE SYSTEM
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<u>Hope that helps! </u> : )
Our skin cells divide rapidly in order to maintain a protective barrier against infection.The outer skin layer is called the epidermis and contains mostly dead cells that contain keratin.Keratin is a tough fibrous protein found in hair,skin and calluses and acts as a protective coating.The epidermis cells are constantly undergoing mitosis so the outer dead cells containing keratin are rapidly replaced as they fall off, which occurs after so many days.Then the newer living cells start producing keratin,lose their cellular contents,then die and the cycle goes on.The skin acts as a barrier to infection,therefore,it's constantly renewed and repaired.
It’s is reproduced by fragmentation,budding or producing spores hope it helps!
