Lytic viruses signs and symptoms can be felt as soon as 12 hours. More likely it’s about 2-3 days.
1. Arteries : Carry's blood away from the heart.
2. Veins : Carry's blood back to the heart.
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3. Capillaries : exchange of materials and gases between the cell and vessel takes place here.</span>
They are like that because they can't always be faulty and may have at least some spark of truth to this theory also as stated earlier a theory in scientific terms is just an observation so it can't really be turned down hence theory.
Because they create their own food so they capture sunlinght to produce sugars