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well, i chose "H" because of the order of skin to bone... So i assumed that "I" is probably ectoderm or simple connective tissue, couldn't really tell... I thought "G" was bone... While "H" was the muscle that usually surrounds bone typically in the limbs... I do admit that if it really is connective tissue, muscle, bone.. they all have a mesodermal origin.. but i defintelly know it cant be anything in the middle.

It looks more like an out branching of a forming limb or anything really. Its a tough question.. im not even sure if im right or not, but thats how i came 2 an answer
 

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Finally I got to label all of them from these books. Figure 8.1 in High Yield Embryology. Figure 9.4 B in Langman's Medical Embryology (very good book, just look illustration, you even doesn't need to read).

Head Arm Jaw Gesture Musical instrument

click image to enlarge

A axial mesoderm, from which vertebrae will develop
B neural tube
C notochord
D aorta
E mesentery
F gut tube
G limb bones
H limb extensor muscles
I fascia (subcutaneous fat)
 

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Finally I got to label all of them from these books. Figure 8.1 in High Yield Embryology. Figure 9.4 B in Langman's Medical Embryology (very good book, just look illustration, you even doesn't need to read).

View attachment 1027
click image to enlarge

A axial mesoderm, from which vertebrae will develop
B neural tube
C notochord
D aorta
E mesentery
F gut tube
G limb bones
H limb extensor muscles
I fascia (subcutaneous fat)
Hi Dear, i didn't find this pic in HY 4th ed. and i dont have langman.
 

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Vikas, just search for embryo pics on google images. Or try downloading Langman or get it from a library. It really is a good book. I have used it for my undergrad studies. But I'm not so sure about it for preparing for step 1.
 
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