Looks great!

Looks great! Nice twisting of the different sections of the pecs!

Great idea! Good work.

This is a nice start. You drew the 3 parts of the pectoralis muscles in the right spots. Here’s how I might draw the pecs on this skeleton. They cross over each other sorta like a fan. I over exaggerated it a bit. Maybe this helps. Keep it up!

I found there is a mistake, this one is the updated version.

Hello! Good work, you're getting the right idea for the pecs. There are a few tweaks that I think can help push your drawings to the next level--mostly using the lines to further indicate the pecs' fanning overlap as it twists and stretches, and more of the thickness of the muscles, especially for a more muscular figure.

After watching the critiques I see that the clavicula section would be almost hidden behind the sternal portion. On the right arm.

Nice!

Hi @Manuel Rioja, really nice studies! - In image 5, the lines you've put down for the fibers of the sternal portion bends strangely. I did an attempt of tracing the muscle. If I've understood it right, the sternal portion twists around itself, similar to the twisting of all the pectoralis major portions; the highest portion inserts lowest and vice versa. For the sternal portion: the fibers that attach high at the origin, attach low at the insertion and vice versa. - I assume these are cleaned up drawings, but in your sketches, I would recommend drawing through to make sure that you're aware of where, for example, the abdominal portion is heading for the insertion, if you aren't already doing that. I hope this helps :)

Hey, Palyo. It looks like you are attaching the Sternal section of the muscle a bit too low here, especially in the skelly drawings. From my experience, the clavicular section inserts the lowest on the humerus and the abdominal attaches the highest. The sternal portion's lowest point is either higher than the clavicular's or at least on the same level (sometimes connecting even to the same tendon. There are a ton of genetic variation on this muscle!). That means that Clav. section will overlap every other section and the sternal will overlap the abdominal. In your skelly drawings, abdominal part seems to attach lower than the other two, making the tendon very wide, which wouldn't give enough room for other muscles, like the bicep, to pass through. If you look at dissections of pectoralis major (which I would highly recommend, seeing it on an actual person is extremely useful), the tendon is surprisingly thin for such a big muscle. Good luck!