Embryology

The eggshell provides protection.

The question is subject to lively debate. Some say that life begins at fertilization, the moment that sperm enters egg. Others say the life begins at conception, which is when the fertilized egg embeds itself onto the placenta.

All vertebrate embryos look roughly the same, showing that they come from a common ancestor.

your mom dude

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Depends on the skill of the AI technician but usually very successful.

forms neural opening

The Whitefish blastula is a fish so it belongs in the Animal kingdom.

1510

it is inside the milkfish body

They develop in the uterine horn, as the fetus grows, it will move into the uterus and then through the birthing canal at parturition.

Yes... sort of. The viscerocranium (bones of the face) and neurocranium (bone surrounding the brain) are both formed from the ectoderm (more specifically from the neural crest). The rest of the skeletal system is formed from the paraxial and lateral (somatic) portions of the mesoderm.

I am currently in a biology class and we have been discussing this.

Do not be fooled by your biology textbook, because it most likely has the wrong information in it. You will probably see a picture of a human embryo compared to embryos of several other animals, and they will all look extremely similar.

Your textbook answer to this question should be that they are very similar in the earliest stages and then diversify as they develop (this shows evidence for common ancestry).

However, this has been proven false. (I happened upon your question while searching for information to support that this has been proven.) I would provide links to evidence and such if I had found them, but my search has literally just started.

Embryos are extremely different in the earliest stages. It is not until a later stage that they become similar. Therefore, this cannot provide evidence for common descent.

So human embryos compared to other animal embryos goes like this:

Very very different

then Similar

then Growing differences

i think the first organ that formed in frog and chick are started at the gastrulation where 3 germ layers are formed first. mesoderm, ectoderm and endoderm. the layer then will differentiate into specific organ such as nerve system, epidermis or etc.

It gives the embryo oxygen it needs to survive in the egg.

Because the females on the stud properties have been selected much more rigorously for superior genetic performance than those mutt cows that are raised on commercial operations. But commercial cows can be used to accept embryos to help grow the calves from the donor cow; however these cows, because of their otherwise inferior genetics and the fact most of them are crossbreds, cannot be used to produce embryos through the process of superovulation.

notochord

The Chorion

You start to trowup and maby feel blaaah for a while

1 embro

the epithelium of the respiratory tract

all chordates

In protostome ("first mouth") the blastopore, or the first opening formed becomes the mouth. In deuterostomes ("second mouth"), the blastopore forms the anus and the mouth develops from a second opening.

The number of tissue layers that develop in the embryo is typically three. These three primary germ layers are the ectoderm, mesoderm, and endoderm. Each layer gives rise to specific tissues and structures in the developing organism.

Yes, a growing embryo inside a pregnant woman receives food and oxygen from the mother's bloodstream through the placenta. The placenta acts as a bridge for nutrients and oxygen to pass from the mother to the developing embryo.

Pancreas