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anatomy of a perchclick to hear

Perch: snub-nosed bony freshwater fish with an oval body and a spiny dorsal fin; the flesh of this fish is highly valued.
anatomy of a perch muscle segment skull urogenital aperture air bladder vertebral column spinal cord neural spine kidney intestine stomach pyloric cecum esophagus heart ventral aorta gills tongue olfactory bulb olfactory nerve brain otolith urinary bladder liver spleen anus eggs first dorsal fin second dorsal fin

muscle segment click to hear

Muscular segment of the posterior portion of the body; its zigzag arrangement contributes to efficient motion.

skull click to hear

Bony structure enclosing and protecting the brain.

urogenital aperture click to hear

Opening common to the genital and urinary tracts allowing the evacuation of gametes and urine.

air bladder click to hear

Flexible air-filled sac located above the viscera; it allows the fish to remain buoyant at a specific depth.

vertebral column click to hear

Movable bony axis made up of various parts articulating with each other (vertebrae); it supports the skeleton and contains the spinal cord.

spinal cord click to hear

Component of the nervous system made up of a soft fatty substance and forming a cylindrical stem inside the vertebral column.

neural spine click to hear

Bony stem of the nervous system connected to the vertebral column and forming the skeleton.

kidney click to hear

Organ that eliminates metabolic waste and maintains the pressure of internal fluids.

intestine click to hear

Section of the digestive tract between the stomach and the anus where absorption of nutrients is carried out and waste is transformed into fecal matter.

stomach click to hear

Dilated section of the digestive tract preceding the intestine; it receives food to be digested.

pyloric cecum click to hear

Lateral canal of the digestive tract where a part of digestion mainly occurs, as well as fermentation.

esophagus click to hear

Canal of the anterior portion of the digestive tract; it carries food to the stomach.

heart click to hear

Muscular organ helping blood to circulate.

ventral aorta click to hear

Canal circulating the blood from the heart to the gills, then on through the head and the rest of the body.

gills click to hear

Respiratory and excretory organs (four pairs) each formed of two layers of filaments; they enable water to exchange oxygen and ammonium as it circulates over the gills.

tongue click to hear

Elongated movable mouthpart having a gustatory function; it allows the fish to swallow its food.

olfactory bulb click to hear

Enlargement of the anterior terminal end of the olfactory nerve where its roots come together.

olfactory nerve click to hear

Cranial cord connecting the brain to the olfactory bulb.

brain click to hear

Main organ of the nervous system that is made up of nerve centers; it is located in the upper portion of the head and is protected by the skull.

otolith click to hear

Small calcareous structure of the inner ear ensuring the fish’s equilibrium in the water.

urinary bladder click to hear

Reservoir in which urine from the kidneys collects before being evacuated through the urogenital aperture.

liver click to hear

Viscera that secretes bile, among other substances; bile helps digestion.

spleen click to hear

Organ of the circulatory system where impurities in the blood are destroyed.

anus click to hear

Terminal orifice of the digestive tract enabling ejection of fecal matter.

eggs click to hear

In fish, the female produces eggs in the ovaries and the male produces soft roe in the testicles; the eggs and roe are expelled into the water, where fertilization occurs.

first dorsal fin click to hear

Swimming appendage formed of a membrane and usually prickly rays located on the middle anterior dorsal portion of the body; it provides stability.

second dorsal fin click to hear

Swimming appendage formed of a membrane and rays located on the middle posterior dorsal portion of the body; it provides stability.