WebPrimitive bivalves have paired gills that are small; in most other bivalves the gills are greatly enlarged. The vascular system contains the heart comprising a medial ventricle with left and right auricles. The reproductive system is simple. The most significant adaptation is the shell with two valves that wholly contains the animal. The oldest known bivalves were … Web11 nov. 2024 · Aquatic larvae. The larvae of some insects live entirely underwater. These larvae often look quite different from their adult forms and have gills to help them ‘breathe’ underwater. Insects with aquatic larvae include mosquitoes, stoneflies and dragonflies. Because their larvae are aquatic, you can often find the adults flying near rivers ...

Bivalve - Anatomy and evolution Britannica

WebMammals have air-filled spaces in their ears and lungs, all of which have the potential to collapse under high pressures. Some marine mammals have adaptations that fill the air … Web17 jan. 2024 · Gills are branching organs located on the side of fish heads that have many, many small blood vessels called capillaries. As the fish opens its mouth, water runs … dutch ttf eu natural gas price

Animal organisation - gaseous exchange systems - BBC Bitesize

Web22 nov. 2024 · Adaptations are those differences that appear in a subset of individuals of a plant or animal species that turn out to improve their survival chances in a specific environment. Those individuals, therefore, tend to … Web9 feb. 2024 · The research, published today in the journal Current Biology, shows that gills develop from the same embryonic tissue in both jawed and jawless vertebrates - a … Web14 sep. 2024 · A gill (/ɡɪl/ ( listen)) is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some … dutch trucker cap