Connective tissue is the tissue of a living organism that does not directly correspond to the work of any organ or organ system, but plays an auxiliary role in all organs, accounting for 60-90% of their mass. Performs basic, protective and trophic functions. Connective tissue<span> has three main components: cells, fibers, and ground substance. </span>Connective tissue<span> is classified into two subtypes: soft and specialized connective tissue. Its main functions are connecting function, keeping water balance, healing function, protection, and trophic function. </span>
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A closed circuit doesn't allow the flow of electrons. an open circuit does. example: if you turn off a switch in your house. you 'broke the circuit it is closed.
Hollow bones are always a disadvantage because it means that they are less sturdy and easier for predators to break.
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virus, bacteria, human cell
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