Exam 5 fish Flashcards
mucus, mucopolysaccharides, immunoglobulins, free fatty acids
Cuticle
Filament containing cell, are the outermost cells and can divide.
Malpighian
- At hind end of stomach,before intestines
- Thin, blind ended tubes
- May secrete trypsin and other digestive enzymes
Pyloric ceca
The bony plate that protects the gills. It is hinged and has muscles attached to it to open and close it
Operculum
a gill like structure under the dorsal operculum. It consists of a single gill arch with a single row of gill filaments. possibly provides well-oxygenated blood to the optic choroid and retina or to maintain blood pressure
Pseudobranch (fake gill)
- helps to make sure that no extraneous material gets onto the gill filaments to clog them up
- counter current system of vessels in the gills
- makes it 5 times as efficient at extracting oxygen
Gill rakers
ionic transport/detoxification
Chloride cells
- The utriculus, sacculus and lagena. Each contain one
- aka ear stone
- usually mineralized
- can be used to age fish
Otoliths
- layered structures of muscles
- not flat, but folded like a W
- seperated from each other by a sheet of connective tissue
Myomeres
- Has electrocytes which produce electricity
- located in the head in marine fish and in tail of fresh water fish
- used for navigation, communication, defense, and sometimes incapacitation of prey
Electric organ
-consists of a cup-like base which rests in the epidermis and a cylindrical gelatinous cupula
Neuromast
-can use it to detect wave movement in the water
Lateral Line
adapts to different salinities
Euryhaline
cannot adapt to different salinities
Stenohaline
Different fins of the fish
- first dorsal
- second dorsal
- pelvic
- anal fin
- caudal fin
- pectoral fin
