The kidneys are in the retroperitoneal space, located inferior to the diaphragm, lateral to the vertebral column, and deep to the peritoneal cavity.
The crura of the diaphragm are muscular bands that attach the diaphragm to the vertebral column. There are two crura: the right crus which is longer and the left crus which is shorter. They play a crucial role in supporting and stabilizing the diaphragm during respiration.
S3
In the human the level of cricoid is the 6th cervical vertebra.
The hyoid bone is at the level/in line with the third cervical (C3) vertebra.
The diaphragm attaches to the bottom six ribs, ribs 7-12.
at the level of the inter-vertebral disc between T4 and T5.
cervical vertebral c5-6
Fourth thoracic
The bifurcation (splitting) of the common carotid artery is in line with/at the level of the intervertebral disc between the third and fourth cervical vertebral (between C3 and C4).
The vertebral body, which is situated anteriorly, houses the vertebral disc.
Adjusting the iris diaphragm level while observing the field of view can change the amount of light entering the microscope. Opening the diaphragm lets in more light, while closing it reduces the amount of light. This can affect the brightness and contrast of the image being viewed.