You can watch the arm lessons to obtain the information you need. The humerus is approximately the same height as the ribs cage, and the insertion point of the deltoid is about halfway down the humerus. The insertion point of the deltoid and the direction of the arm can indicate the starting position of the humerus, I believe.

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Because of the shape of the clavicle and the position of the scapulae when they are retracted in that pose.

Looks like a pretty good job to me, @Eveline Rupenko! Solid forms and coherent representations of the motion of the scapulas and their relationship with the clavicles overall. I’d do just one thing differently in the last two ones: try to push the clavicles a bit more towards the front in order to show the protraction. Other than that, keep up the good work!

Quick feedback. Seems the clavical is not lining up with the ribcage. The perspective does not match. Also, if the near side is too large and too high up the page; This level of foreshortening from front to back means a very low focal length or fisheye lens. Try to keep the bones in line with the left vanishing point that you established with the ribcage. Also note because the clavical was off, so are the scapula which completes the shoulder girdle structure. Lastly, the S shape of the clavical is more subtle. Don't overdo it. Use reference when in doubt.

This is a bit of a response to the very helpful and much appreciated feedback from @Dwight over in the ribcage section, I’ve been focusing on not making the lumbar section too long in my drawings - so here’s some examples of that. I’ve also been thinking about my technique aside from anatomy and constructive drawing - I’m tackling the problem of being too heavy handed and just trying to meditate on lightening my grip on the pencil for my lay in so that my lines are legible in the final construction. I’m gonna move onto muscles now and not try to stay too stuck into the skeleton because i’ll be drawing that anyways before i draw the muscles overtop, so looking forward to that and good luck to everyone else on their anatomical art adventure!

Yeah, it is really challenging!!! I struggled with it a lot, but know it is my favorite part of the skeleton :) It's really cool😎 To get a better understanding of the scapula it helped me to practice drawing it from imagination; in a simplified format. Just to play around with it's range of motion and relationship to the other bones. I came up with a mass conception of the scapula last year that I'm really happy with. I attached an image of it, in case you find it useful. Hope this helps :) Keep up the good work!

Hi Sarvesh. Remember that the clavicles are located above the first rib on the rib cage. See attached image. On your first and last drawings, the rib cage hole and clavicles look oddly placed. Good luck!