Simulation · Biology · Class 11
Which duct carries what?
"Which duct carries what?" is a free, interactive Class 11 Biology simulation for NEET, built on the lesson "Reproduction and development" in Structural Organisation in Animals. Choose a male or a female frog, then trace urine or gametes. The duct they travel in lights up, and the route is spelled out below. Male: ureter = urinogenital duct; testes held on the kidneys by the mesorchium. Female: ureters and oviducts open separately. The cloaca receives faeces, urine and gametes.
From the lesson Reproduction and development in Structural Organisation in Animals. Change the values and watch what happens.
Which duct carries what?Biology · Class 11
The idea behind it
NCERT §7.2.2
- The male reproductive organs are a pair of yellowish, ovoid testes, attached to the upper part of the kidneys by a double fold of peritoneum called the mesorchium.
- Ten to twelve vasa efferentia leave the testes and pass into the kidney on the same side, where they open into Bidder's canal. Bidder's canal connects with the urinogenital duct coming out of the kidney, and this duct opens into the cloaca.
- The cloaca is a small median chamber through which faecal matter, urine and sperms all pass to the outside.
- The female reproductive organs are a pair of ovaries lying near the kidneys, with no functional connection to them. A pair of oviducts arising from the ovaries opens into the cloaca separately.
- A mature female lays 2500 to 3000 ova in one go.
- Fertilisation is external and happens in water. Development includes a larval stage, the tadpole, which undergoes metamorphosis to become the adult.
- Frogs are useful to people: they eat insects and so protect crops, and they are an important link in food chains and food webs, keeping the ecosystem in balance. In some countries their muscular legs are eaten.
Questions
2 answers
- What does the "Which duct carries what?" simulation show?
- Choose a male or a female frog, then trace urine or gametes. The duct they travel in lights up, and the route is spelled out below.
- Is this simulation free?
- Yes. It is free and runs in the browser on a phone or a laptop. It belongs to the lesson "Reproduction and development" in Structural Organisation in Animals (Class 11 Biology).
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