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Q2:
Mention the function of the Ureters in frog.
Solution :
Biological Context & Anatomical Position
In the common frog (Rana tigrina), the ureters are bilateral tubular structures that serve as the primary conduits of the excretory system. Anatomically, they originate from the kidneys and terminate in the cloaca, functioning as the pathway for the transport of nitrogenous waste [Per comparative anatomy of Amphibia].
Step 1: Primary Function in Males
In the male frog, the ureters serve a dual purpose, functioning as a urinogenital duct. The functional mechanisms are as follows:
- Excretory Transport: The ureters receive urine from the kidneys and transport it to the cloaca for temporary storage in the urinary bladder.
- Reproductive Transport: Because the vasa efferentia (which carry sperm from the testes) enter the kidneys and join the uriniferous tubules, the ureters also act as a passage for the transport of spermatozoa. Thus, the ureter is functionally labeled the urinogenital duct [By physiological coupling of the renal and reproductive systems].
Step 2: Primary Function in Females
In the female frog, the reproductive system is entirely distinct from the excretory system. Consequently, the function of the ureters is strictly specialized:
- Exclusive Excretion: The ureters function solely as urinary ducts. They carry urine from the kidneys directly to the cloaca, which is then either excreted or stored in the urinary bladder [Per independent anatomical pathways in female Anura].
- Non-involvement in Reproduction: In females, the oviducts are separate tubes that open independently into the cloaca; therefore, the ureters handle no gametic transport.
Summary of Functional Differentiation
| Sex | Anatomical Label | Physiological Function |
|---|---|---|
| Male | Urinogenital Duct | Transports both Urine and Spermatids |
| Female | Urinary Duct | Transports Urine exclusively |
Final Solution: The function of the ureters in frogs is to transport urine from the kidneys to the cloaca; however, in male frogs, they additionally serve as urinogenital ducts by transporting spermatozoa, a function absent in females due to the independent nature of the female reproductive tract.
More Questions from Class 11 Biology Structural Organisation in Animals EXERCISES
CBSE Solutions for Class 11 Biology Structural Organisation in Animals
Chapters in CBSE - Class 11 Biology
- The Living World
- Biological Classification
- Plant Kingdom
- Animal Kingdom
- Morphology of Flowering Plants
- Anatomy of Flowering Plants
- Cell – The Unit of Life
- Biomolecules
- Cell Cycle and Division
- Transport in Plants
- Mineral Nutrition
- Photosynthesis
- Respiration in Plants
- Plant Growth and Development
- Digestion and Absorption
- Breathing and Exchange of Gases
- Body Fluids and Circulation
- Excretory Products and Elimination
- Locomotion and Movement
- Neural Control and Coordination
- Chemical Coordination and Integration
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