The water vascular system of a sea star enables movement, digestion and respiration through the use of water to exert force on limbs known as tube feet. The vascular system is primarily water but also contains coelomocytes, protein and potassium salts.
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>
The most prominent example of carbon fixation is photosynthesis
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Humans use selective breeding to pass desired TRAITS on to the next generation of organisms.
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