You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Structures at Angle of Louis and explain in detail?
Sternal angle/Louis angle:It is felt as a transverse ridge about 5cm below the suprasternal notch.It marks the manubriosternal joint and lies at the level of the second costal cailage anteriorly and the disc between the fouh and fifth thoracic veebrae posteriorly.This is an impoant landmark for many reasons.The arch of aoa begins and also ends at this level. BD CHAURASIA'S HUMAN ANATOMY UPPER LIMB THORAX SIXTH EDITION VOLUME 1.PAGE NO187