Blog
Frog Urogenital System Short Notes | Free Biology Notes

In this article we will discuss about the frog urogenital system
Frog Urogenital System
- The urinary and reproductive systems are linked and collectively referred to urinogenital system
- The frog Urogenital system responsible for urine excretion and reproduction
- Frogs are ureotelic animals because urea is their main excretory product
- Frogs have separate sexes, so they are dioecious
- Male and female frogs can only be distinguished externally during the breeding season
- Males developing a copulatory or nuptial pad on their first forelimb digit
- Males also have vocal sacs
- Male and female frogs have the same excretory system, but their reproductive structures are different
Male Frog Urogenital System
Kidney
- Both kidneys are elongated, compact, flattened, and dark red
- Each kidney consists of many functional and structural units called nephrons or uriniferous tubules
- Tadpole kidneys are pronephros, whereas adult kidneys are mesonephros
Urinary bladder
- It is a large, thin walled and bilobed structure
- Present ventral to the rectum. It stores urine
Ureter
- Ureter or the urinogenital duct occur in pairs
- The ureters opens into cloaca and helps in passing the urine and sperm
Testis
- The testis are attached to kidneys by mesorchium
- Testis is composed of a large number of seminiferous tubules
- The wall of seminiferous tubules is made up of germinal epithelium, which forms sperms by spermatogenesis
Vasa efferentia
- Emerges from the testis and are 10-12 in number
- They pass through mesorchium and entering the kidney and opening into the bidders canal
- Collecting tubules of the kidney and the bidders canal communicates with the ureter
Cloaca
- Small chamber mediating to pass urine, faeces and sperms to the outside
- The ureter and urinary bladder opens into the cloaca
Female Frog Urogenital System
Kidney
- Both kidneys are elongated, compact, flattened, and dark red
- Each kidney consists of many functional and structural units called nephrons or uriniferous tubules
- Tadpole kidneys are pronephros, whereas adult kidneys are mesonephros
Urinary bladder
- It is a large, thin walled and bilobed structure
- Present ventral to the rectum. It stores urine
Ureter
- Ureter occur in pairs
- The ureters opens into cloaca and helps in passing the urine and sperm
Ovary
- It is a paired structure found near the kidneys
- Ovary covered by fold of peritoneum known as the mesovarium
- They produce ova through the process of oogenesis
- A mature female can produce between 2500 and 3000 eggs all at once
Oviducts
- They are paired and found on each side of the ovary
- These ducts open separately into the cloaca
Cloaca
- Small chamber mediating to pass urine, faeces and ova to the outside.
- The ureter and urinary bladder opens into the cloaca
Copulation
- Copulation takes place in water during breeding season
- Male produce croaking sound with the help of vocal sacs
- The croaking is a mating call for the female frogs
- The male frog rides over the female frog and embraces it.
- The male frog holds the female frog firmly by its forelimbs and nuptial pads
- The couple remains in this condition for 2-3 days
- At this stage orgasm female discharges a large number of eggs in water and same moment discharges its sperms over the eggs falling in water.
- The two animals separate from each other on completion of this process
Fertilization
- The fertilisation is external, taking place in water
- In the fertilisation sperm and ova fuse together to form zygote
- The eggs hatch into tadpoles which later on undergo metamorphosis to develop into adults
- Entertainment1 week ago
Ibomma Bappam: Redefines Telugu Streaming Trend
- Blog2 weeks ago
[PPT] The living world Class 11 Notes
- Blog2 weeks ago
[PPT] Human Reproduction Class 12 Notes
- Blog2 weeks ago
Class 12 Biology Notes Chapter wise PPT
- Blog2 weeks ago
[PDF] NEET Biology Study Materials Download
- Blog2 weeks ago
Download NEET Biology Study Materials in Tamil
- Business2 weeks ago
Ecryptobit.com Wallets: A Comprehensive Guide to Secure Crypto Storage
- Blog2 weeks ago
Biology Study Notes Class Wise PPT