Birds have sex via an internal chamber called a cloaca that is present on both male and female animals. Skip to main content. ... Bird quiz: How much do you know about our feathered friends?

But how did we get from dinosaur’s prehistoric holes to the modern bird cloaca? The Psittacosaurus specimen from Liaoning is our best glimpse to date. A close-up of the cloaca, within an off ...

For the first time, scientists have described the cloaca, or vent, of a dinosaur -- the all-purpose opening used for reproduction and waste disposal.

The cloaca is the multitool of a bird's anatomy: It leads to the urinary, digestive and reproductive tracts. It's through this hole that birds simultaneously pee and poop onto cars and ...

The cloaca is the part of the bird’s body which stores urates, feces, urine and egg. The cloacal lips (or vent) are used to control the passage and frequency of droppings and other eliminations.

Developing bird embryos do have penis precursors, it turns out, but a genetic signal causes the penis cells to die off during gestation. Image via Wikimedia Commons/Habib M’henni Take a close ...

What did the Romans want with a Cloaca Maxima, and how did they use it? WILL you pardon me for asking a question which probably I ought to be able to answer myself? Mr.