Webb24 okt. 2024 · These grape-like structures are called alveoli and are basically tiny air sacs with very thin walls that serve as the main site of gas exchange. Alveoli clusters create a honeycomb-like structure ... WebbGas exchange and excretion occur through cilia-lined sacs called bursae; each opens between the arm bases on the underside of the disk. Typically ten bursae are found, and each fits between two stomach digestive pouches. Water flows through the bursae by means of cilia or muscular contraction.
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Webb8 juni 2024 · There are various methods of gas exchange used by animals. As seen in … moisture resistant primer shaw
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WebbEchoing Astar Network's vision to be the heart of the multi-chain future, Starfish aims to … WebbGas exchange occurs at two sites in the body: in the lungs, where oxygen is picked up and carbon dioxide is released at the respiratory membrane, and at the tissues, where oxygen is released and carbon dioxide is picked up. External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs. WebbGaseous exchange occurs via dermal branchiae or papulae in starfish, genital bursae in brittle stars, peristominal gills in sea urchins and cloacal trees in sea cucumbers. Exchange of gases also takes place through the … moisture resistant peel and stick wallpaper