WebTropical species are often brightly coloured. Most species have paired fins and skin covered with either bony or toothlike scales. Fishes generally respire through gills. Most bony fishes have a swim bladder, a gas-filled organ used to adjust swimming depth. Most species lay eggs, which may be fertilized externally or internally. WebMay 3, 2024 · The gills are the breathing apparatus of fish and are highly vascularized, which gives them their bright red color. An operculum (gill cover) is a flexible bony plate that protects the sensitive gills. Water is “inhaled” through the mouth, passes over the gills and is “exhaled” from beneath the operculum. Eyes Fish can detect color.
Vestigial hiccups, folding fish-eyes, and other fables
WebOxygen is absorbed as the water passes over the fish's gills, and this oxygen enters the fish's bloodstream so the fish can use it for metabolic processes. Carbon dioxide is a … WebMay 18, 2011 · Evolutionists point to sequential homologies in fish gills, fish jaws, reptilian jaws, and mammalian ear bones. Homologues are similar embryonic structures, such as Meckel’s cartilage, which have different destinies in different kinds of creatures. Meckel’s cartilage supports the gills in cartilaginous fish. son focallure 2 đầu
Respiration in Fishes - Concurrent Exchange Mechanism, …
WebApr 5, 2024 · Gills are located next to the mouth cavity of the fish. Gills have a red color because they're filled with blood vessels Most fish exchange oxygen and carbon dioxide that's dissolved in water. Gills absorb oxygen, which is dissolved in water and releases co2 (carbon dioxide). WebDescribe the features of fish gills that give them a large surface area. (2 marks) (gills have) lamellae on filaments; lots of both; The graph shows the relationship between gill surface area and body mass for three species of fish. WebFish and many other aquatic organisms have evolved gills to take up the dissolved oxygen from water ( Figure 20.4 ). Gills are thin tissue filaments that are highly branched and folded. When water passes over the gills, the dissolved oxygen in water rapidly diffuses across the gills into the bloodstream. son for you