which of the following is the charactheristics of the lamella membrane of fish that ease the absorption and transportation of oxygen and carbon dioxide?

• thick and moist

• smooth and dry

• thin and supplied with many blood capillaries

• thin and highly permeable

what structure in the respiratory system of the fish increases the surface area for gaseous exchange?

• filament

• gill arch

• operculum

• base of the mouth

what is the respiratory aperture for fish?

• nostrils

• mouth and operculum

• spiracle

what is the breathing mechanism of fish?

• contraction and relaxation of the intercostal musclesand diaphragm muscles

• rapid movement of the buccopharyngeal cavity floor and elasticity of the lungs

• contraction and relaxation of abdominal muscles

• movements of the floor of the buccal cavity and operculum

gaseous exchange between blood and water in fish occurs through

• diffusion

• active transport

what causes the water to flow through the operculum opening of the fish during exhalation?

• lower pressure in the buccal cavity

• higher pressure in the cavity buccal

• higher pressure in the buccal cavity

what is the name of the respiratory structure of fish

• filament

• gill arches

• blood capilaries

• gills

what are the many thin and flat projections called in the filament?

• operculum

• bladder

• lamella

• ureter

what are the row of filaments supported by in the gills?

• operculum

• gill arches

• blood vessels

• filaments

when fish swim, they open and close their operculum?why?

• for ventilation process to occur

• for inhalation process to occur

• for exhalation process to occur

• for transpiration process to occur