excretory & reproductive anatomy
DESCRIPTION
Excretory & Reproductive Anatomy. Excretory & Reproductive - Close anatomical ties. Typical vertebrate arrangement Excretory and reproductive anatomy closely tied May share common ductwork in some individuals. Excretory/Reproductive Systems. General locations. Kidneys. - PowerPoint PPT PresentationTRANSCRIPT
Excretory & Reproductive- Close anatomical ties
Excretory & Reproductive- Close anatomical ties
Typical vertebrate arrangement
Excretory and reproductive anatomy closely tied
May share common ductwork in some individuals
Typical vertebrate arrangement
Excretory and reproductive anatomy closely tied
May share common ductwork in some individuals
Excretory/Reproductive Systems
Excretory/Reproductive Systems
Systems lie in close proximity to one another within body cavity
Systems lie in close proximity to one another within body cavity
Excretory SystemExcretory System
Pronephros - functional in adult hagfish, fish embryos
Pronephros - functional in adult hagfish, fish embryos
Excretory SystemExcretory System
Mesonephros - portion of functional kidney in adult fish
Mesonephros - portion of functional kidney in adult fish
Fish kidneysFish kidneys
Diffuse organs on either side of vertebral column
Varying degree of connection with reproductive system
Little connection in most advanced fishes
Diffuse organs on either side of vertebral column
Varying degree of connection with reproductive system
Little connection in most advanced fishes
Shark kidneyShark kidney
Sharks and relatives have close ties between kidneys and testes
Share ductwork
Sharks and relatives have close ties between kidneys and testes
Share ductwork
Kidneys and urinary bladder
Kidneys and urinary bladder
Some fish have a urinary bladder Located at end of ureter(s) More often present in male fish
Some fish have a urinary bladder Located at end of ureter(s) More often present in male fish
HagfishesHagfishes
Monoecious - all individuals have capacity to be either male or female
Single gonad can develop into testis or ovary Can it switch or be both at same time?
Monoecious - all individuals have capacity to be either male or female
Single gonad can develop into testis or ovary Can it switch or be both at same time?
Hagfish ovaryHagfish ovary
Produces few, large eggs 1 or 2, or up to 30, depending on
species
Produces few, large eggs 1 or 2, or up to 30, depending on
species
Hagfish ovaryHagfish ovary
Eggs get dumped into body cavity before exiting body
Internal/self fertilization?
Eggs get dumped into body cavity before exiting body
Internal/self fertilization?
Lamprey ovary or testisLamprey ovary or testis
Lampreys are male or female
Single ovary or testis
Reproductive products dumped into body cavity before exiting (no ductwork)
Lampreys are male or female
Single ovary or testis
Reproductive products dumped into body cavity before exiting (no ductwork)
Class ChondrichthyesClass Chondrichthyes
Sexes separate and fertilization internal
Oviparous, ovoviviparous, viviparous
Sexes separate and fertilization internal
Oviparous, ovoviviparous, viviparous
Shark testesShark testes
Paired testes Located near
anterior end of body cavity
Paired testes Located near
anterior end of body cavity
DuctworkDuctwork
Ducts convey sperm to storage area Stored until copulation
Ducts convey sperm to storage area Stored until copulation
External sex characteristicsExternal sex
characteristics Pelvic claspers in
males Aid in sperm
transfer to female Female with
simple cloacal opening
Pelvic claspers in males
Aid in sperm transfer to female
Female with simple cloacal opening
Other characteristicsOther characteristics
Male sharks, chimaeras may have head clasper as well as well as pelvic clasper
Not used in sperm transfer
Male sharks, chimaeras may have head clasper as well as well as pelvic clasper
Not used in sperm transfer
Bony fishesBony fishes
Most bony fish are dioecious (male and female)
Gender differences not always very apparent
Tubercles may develop in males
Most bony fish are dioecious (male and female)
Gender differences not always very apparent
Tubercles may develop in males
Bony fishesBony fishes
Others may develop vivid colors Males boldly marked Many minnows, darters
Others may develop vivid colors Males boldly marked Many minnows, darters