ohyeahdevelopmentalbiology
ohyeahdevelopmentalbiology:

ohyeahdevelopmentalbiology:

Depictions of chick developmental anatomy. (A) Dorsal view (looking “down” at what will become the back) of a 2-day chick embryo, as depicted by Marcello Malpighi in 1672. (B) Ventral view (looking “up” at the prospective belly) of a chick embryo at a similar stage, seen through a dissecting microscope and rendered by F. R. Lillie in 1908. (C) Eduard d’Alton’s depiction of a later stage 2-day chick embryo in Pander (1817). (D) Modern rendering of a 3-day chick embryo. Details of the anatomy will be discussed in later chapters. (A from Malpighi 1672; B from Lillie 1908; C from Pander 1817, courtesy of Ernst Mayr Library of the Museum of Comparative Zoology, Harvard; D after Carlson 1981.)

ohyeahdevelopmentalbiology:

ohyeahdevelopmentalbiology:

Depictions of chick developmental anatomy. (A) Dorsal view (looking “down” at what will become the back) of a 2-day chick embryo, as depicted by Marcello Malpighi in 1672. (B) Ventral view (looking “up” at the prospective belly) of a chick embryo at a similar stage, seen through a dissecting microscope and rendered by F. R. Lillie in 1908. (C) Eduard d’Alton’s depiction of a later stage 2-day chick embryo in Pander (1817). (D) Modern rendering of a 3-day chick embryo. Details of the anatomy will be discussed in later chapters. (A from Malpighi 1672; B from Lillie 1908; C from Pander 1817, courtesy of Ernst Mayr Library of the Museum of Comparative Zoology, Harvard; D after Carlson 1981.)

the-star-stuff
the-star-stuff:

And now, a chicken grown in a Petri dish

A fertilized, incubated chicken egg takes about 21 days to hatch; and while most of us have seen what chicks look like at either end of the developmental spectrum (either sunny-side-up in a frying pan or newly hatched in a nature documentary), the fact that egg shells aren’t see-through means that not many people have seen what goes on between days 2 and 20.
Well… now you have.
Having said that, it is possible to grow a chicken in a petri dish. Several methods papers have been published on the subject of Petri-grown chicks, beginning with the Auerbach method in 1974. You can check out the full set of images over on imgur.
[Via reddit]

the-star-stuff:

And now, a chicken grown in a Petri dish

A fertilized, incubated chicken egg takes about 21 days to hatch; and while most of us have seen what chicks look like at either end of the developmental spectrum (either sunny-side-up in a frying pan or newly hatched in a nature documentary), the fact that egg shells aren’t see-through means that not many people have seen what goes on between days 2 and 20.

Well… now you have.

Having said that, it is possible to grow a chicken in a petri dish. Several methods papers have been published on the subject of Petri-grown chicks, beginning with the Auerbach method in 1974. You can check out the full set of images over on imgur.

[Via reddit]

rotiferola
ohyeahdevelopmentalbiology:

victoriousvocabulary:

 EMBRYO
1. an organism in its early stages of development, especially before it has reached a distinctively recognizable form.
2. an organism at any time before full development, birth, or hatching.
3. the fertilized egg of a vertebrate animal following cleavage.
4. in humans, the prefetal product of conception from implantation through the eighth week of development.

ohyeahdevelopmentalbiology:

victoriousvocabulary:

 EMBRYO

1. an organism in its early stages of development, especially before it has reached a distinctively recognizable form.

2. an organism at any time before full development, birth, or hatching.

3. the fertilized egg of a vertebrate animal following cleavage.

4. in humans, the prefetal product of conception from implantation through the eighth week of development.