Carries the sperm from the testes to the archinepric duct

transports sperm and seminal fluids

collects and transports urine from the kidneys

urinary papilla in females, urogenital papilla in males

secretes salt against an electrochemical gradient that requires the expenditure of energy

reabsorbs nearly all filtered urea from the primary urine

to generate germ cells, yolk, and synthesize and secrete hormones

a tube leading to the womb, where the egg and the spermatozoon meet and fertilization occurs

Passes along fertilized eggs

transport sperm from the cauda epididymis to the prostatic urethra

fertilized eggs develop into embryos here

receives the genital and urinary products as well as the rectal wastes

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retaining fertilized eggs in or on a parent's body

born by hatching out of an egg

hatch from an egg retained within the mother and are born live

Ovovivipary

the movement of molecules from high to low concentration

the balance of water and ions in a fish

a low volume of dilute urine

a high volume of dilute urine

where the blood enters the heart and drains into the atrium; common cardinal vein empties into this structure

pumps blood to the dorsal ventricle

pumps oxygenated blood through the conus arteriosus to the gills and the body

contains a series of semilunar valves that direct the blood flow; Structure that receives blood from the ventricle

carry deoxygenated blood from the heart to the gills

flows into the interbranchial septa and sends numerous small branches into the gill lamellae

serve to return oxygenated blood from the gills

This vessel brings blood from the gills to all the cells of the body

passes blood to sinus venosus; brings blood back to the heart complex after blood has nourished the cells.

Arteries carry blood away from the heart, and veins carry blood towards the heart

to create red blood and is a dark organ near the stomach