Left vs Right Kidney
Kidneys are a pair of organs that lie on either side of the vertebral column, and are located in the posterior abdominal wall underneath the diaphragm. Each kidney is about 11 to 14 cm in length, about 6cm in width and about 3cm in thickness. Each kidney contains millions of its functional units called nephrones. Kidneys are surrounded by a fibrous tissue called renal capsule. The cortex, medulla, pelvis, and hilum are the main parts of the kidney. Adrenal glands are located on the top of each kidney. Major branch of the abdominal aorta called ‘renal artery’ enters from the concave side of the kidney. The major role of the kidney is to filter excess chemicals and wastes from the blood, which is entered through renal arteries. These wastes extracted from the blood are eliminated from the body as urine. Other than excretion, homeostasis, osmoregulation, regulation of salts in the body, regulation of pH, and production of hormones are also considered as important functions of kidneys.
The left kidney is positioned in the left side of the body related to rib 11 and rib 12. Normally the left kidney is 0.5 to 1.5 cm longer than the right kidney. When considering relationship to neighboring structures, the anterior surface of the left kidney is associated with left suprarenal gland, spleen, pancreas, stomach, left colic flexure of the large intestine, and the jejunum while the posterior surface is associated to rib11 and rib12, diaphragm, psoas major, quadratus lumborum, tendon of the transverses abdominis muscle, and transverse process of vertebra L1.
The right kidney is positioned in the right side of the body related to rib12. The anterior surface of the right kidney is associated to the right suprarenal gland, liver, descending part of the duodenum, right colic flexure of the large intestine, and the small intestine though posterior surface of the right kidney is associated with rib12, diaphragm, psoas major, quadratus lumborum, tendon of the transverses abdominis muscle, and transverse process of vertebra L1.
What is the difference between Left and Right Kidney?
• Left kidney is positioned slightly upper than the right kidney due to the asymmetry within the abdominal cavity caused by the liver.
• Anterior and posterior surface of left and right kidneys are related to different neighboring structures of the body.
• The size of the left kidney is slightly larger than that of the right kidney.
• Left renal artery serves blood to the left kidney while right renal artery serves blood to the right kidney.