Anatomical features, Relations and Attachments of colon

Anatomical features, Relations and Attachments of colon

Colon Introduction.,

Colon Introduction., Large bowel extends from ileocaecal junction to the Anus Large intestine = caecum + colon + rectum Colon is Divided into., Ascending colon Transverse colon Descending colon Sigmoid colon

Anatomical features of colon

Anatomical features of colon Large intestine is wider at caecum (7.5cm) and narrower at sigmoid colon (2.5cm) Greater part of colon is fixed (i.e, Reteroperitoneal) except at the Tranverse colon Sigmoid colon Longitudinal muscle plays some important roles in colon Major role is to form 3 ribbon like bands termed Taenia Coli Minor role in forming a thin layer of muscle coat in colon

Anatomical features of colon (Taenia coli)

Anatomical features of colon (Taenia coli) Now let us see about TAENIA COLI., They are 3 in nos 1 anterior (t. libera) 1 posteromedial (t. mesocolia) 1 posterolateral (t. omentalis) Location of these taenia is not same in the entire large bowel…bcoz large bowel is not a pvc pipe but flexible fire service pipe Taenia converge @ appendix and helps in identification of appendix

It diverges @ distal part and continues with long. Muscles of rectum

Anatomical features of colon contd.,

Anatomical features of colon contd.,

Anatomical features of colon (Haustrations)

Anatomical features of colon (Haustrations) As discussed already longitudinal muscle layer is very thin in colon But circular muscle layer of colon is very thick This leads to formation of sacculations (termed HAUSTRATIONS)

Barium enema…,

Barium enema…,

Anatomical features of colon (Appendices Epiploicae)

Anatomical features of colon (Appendices Epiploicae) Small bags of filled with fat (termed APPENDICES EPIPLOICAE) Present all over colon ( not all over large bowel – bcoz absent in caecum, rectum) It’s looking like makeup or artwork for colon, but usually it’s too dangerous. Bcoz it’s rich in anastomosis If peeled up by extra traction bleeding and antimesenteric border ischemia occurs

Anatomical features of colon (Appendices Epiploicae)

Anatomical features of colon (Appendices Epiploicae) It’s looking like makeup or artwork for colon, but usually it’s too dangerous. Bcoz it’s rich in anastomosis If peeled up by extra traction bleeding and antimesenteric border ischemia occurs

Anatomical features of colon (diverticulosis)

Anatomical features of colon (diverticulosis) Large bowel wall is weakened at region where vessels pierce the wall and Attachment of appendices epiploica So, mucosa may herniate at these areas and will lead to diverticulosis, which may later bcom diverticulitis, fibrosis and stricture