Terms in this set (52)
at anterior end of the animal. It's where the fish feeds.
two pairs, each pair opens into an olfactory (smell) chamber and allows water to pass through the chamber. The movement of water is essential to odor perception.
Two large spherical eyes are located on each side of the head.
allow water passing through gills to exit
a semicircular flap that covers the gills.
paired fins found on either side of the perch.
paired fins found close together on the ventral surface of the fish trunk
Anterior dorsal fin
single fin found on the dorsal side of the fish and supported by 13 to 15 spiny rays.
Posterior dorsal fin
single fin located directly behind the anterior dorsal fin and supported by 7 to 8 soft rays.
the fleshy end of the tail is surrounded by this fin;the type of caudal fin found on the perch is called homoceral
Single fin located behind the anus on the ventral side and supported by soft rays.
opening through which feces are eliminated from the fish body.
envelope for the body and the first line of defense against disease; it also affords protection from, and adjustments to, environmental factors that influence life.
glands located in the skin, the secretions of which give the slimy touch and odor to the fish.
thin, flexible plates, that provide a flexible "armor" to protect the fish. They are used in growth and age studies. The scales of perch are called ctenoid because the exposed portion bears tiny, spiny structures called cteni (teeth).
Lateral line system
a sensory organ system restricted to the fish and aquatic stages of amphibians; it enables a fish to detect localized disturbances from currents or vibrations caused by fixed or moving objects.
Controls body movements
Serves in the exchange of gases with the environment
organs of respiration that have thin walls that are supplied with blood capillaries, as are our lungs.
serve as attachments for the gills.
tiny fingers running at right angles to the length of each gill. Oxygen dissolved in water diffuses through the thin wall of each gill filament into capillaries, and carbon dioxide diffuses in the opposite direction.
bony structures located on each gill arch and pointing toward the pharynx. Collectively, they act as a strainer preventing food and other particles from being carried across the gills, which could cause the gills injury.
Solid roof extending form the mouth cavity to the pharynx
The transport system of the body supplies oxygen and nourishment to body cells and removes metabolic wastes.
a two-chambered, muscular organ that receives blood from the body, circulates it to the gills for oxygenation to the body, and the back to the heart. Blood in the fish passes from the atrium to the ventricle without being oxygenated.
carry blood from the heart to the body tissues.
carry blood to the heart from the body tissues.
a related circulatory organ; an elongated structure lying on the posterior dorsal surface of the stomach. It is concerned with the production and maintenance of blood cells.
functions to both mechanically and chemically break down food into simple components that can be easily absorbed by the blood and passes throughout the body to provide body cells with nourishment.
a short, straight tube leading from the mouth to the stomach.
receives food from the esophagus and digests the food's protein components.
three blind sacs located at the anterior-most part of the duodenum, where it connects to the stomach. The pancreatic and bile ducts open here.
partially digested food is passed from the stomach to this organ for final digestion. The duodenum forms an s-shaped loop from its origin at the stomach.
final digestion and absorption of food from the duodenum takes place here.
white masses located around the intestine; they function to store food reserves.
outside opening of the intestine through which solid waste is passed.
Reddish brown, lobed organ situated just anterior and dorsal to the stomach. It produces bile, which aids in fat digestion and the regulation of nutrient levels in the blood.
Greenish sac between the loves of the liver; stores bile before release to the duodenum.
A small, folded organ located at the ventral border of the duodenum; manufactures pancreatic juices that further digest proteins.
Removes metabolic waste products from the blood.
Paired, elongated masses pressed against the dorsal body wall.
Tubes that drain each kidney. In the male, they connect to the urinary bladder. In the female, they connect to the kidney to a urogenital sinus where the urinary bladder is incorporated into the oviduct.
External projection of the male urinary bladder. Waste products (urine) are eliminated from the body though a urinary pore. In the female, urine is eliminated though the abdominal pore.
A small sac of the most posterior, ventral area of the body cavity; functions to store urine.
Responsible for the production of sex cells and their delivery to produce offspring; sex organs are separate in the perch.
(Male)- paired, lobulated structures, posterior to the duodenum and stomach, and dorsal to the intestine. They produce sperm, which is transported to the outside by a duct called the vas deferens and eliminated through the genital pore.
(Female)- Single, large sac located in the same position in the body as are the testes in the male. The ovary produces white spherical eggs, which fill the cavity to capacity in the spring.
A funnel- like structure where the urinary bladder is incorporated. Eggs are expelled through the abdominal pore.
Gas bladder or swim bladder
Gas bladder or swim bladder- helps regulate depth idependently of body motion; located ventral to the kidney and dorsal to the sex organs.