Categories
biology

The blastopore of bryozoan embryos

This is a bryozoan embryo exhibiting its blastopore. These animals are discreet but ubiquitous in oceans and lakes all over the world.

Bryozoan embryo during gastrulation.
Embryo of the bryozoan Membranipora membranacea under confocal microscopy.

What we see is the DNA inside the nucleus of the cells of the embryo. The color gradient indicates if the nuclei are closer (yellow) or further away (purple) from the microscope camera.

The embryonic cells are arranged in a circle and form a central opening that we call the blastopore. This opening, in bryozoans, will become the mouth of the animal after the embryo develops.

You can follow the process on video or learn more details in the paper.

What about our mouth, where does it come from?

Categories
biology

Fruit fly embryo

A short video that I made about the embryonic development of the likeable Drosophila, also known as fruit fly or vinegar fly, won an honorable mention in the Small World in Motion.

A single embryo imaged from four different angles.

The details on the techniques I used and the video on its full resolution are available for download and re-use on the Wikimedia Commons.

Categories
biology

Bryozoan embryos viewed from the animal and vegetal poles

Categories
biology

Bryozoan embryos viewed from the animal pole

Categories
biology

Embryonic cell division

Categories
biology

Turtles, embryos, and fossils

I wrote a text about the development and evolution of the turtle shell on The Node: Turtles in a nutshell.

Turtle at Henry Doorly Zoo, Omaha. Photo by Algy3289.

It shows the beginning of shell formation in embryos and how this can help us understand the evolution of such unique body pattern. 3D animations and fossils are included!

Never thought I would post a vertebrate on this website… but having shoulders inside the rib cage made me make an exception, poor things :p

Categories
biology

A Sea Biscuit’s Life

My video about the life cycle of a sea biscuit is now online!

Also available on Vimeo. Learn more at: http://mestrado.organelas.com/en/videos/