The infinitive is the most basic form of a verb. In Spanish, infinitives always end in -ar, -er or -ir, with -ar being the most common. An infinitive by itself does not indicate tense nor who or what is performing the action of the verb. In both English and Spanish, the infinitive can often function as a noun. In Spanish, such a noun is always masculine and is usually used in the singular form. The Spanish word for infinitive is infinitivo. Other examples of infinitives in Spanish are hablar, viajar, comprender, and resistir.
1 The kidneys are a pair of bean-shaped organs that lie on either side of the spine in the lower middle of the back. 2  Each kidney weighs about 5 ounces and contains approximately one million filtering units called nephrons.  Each nephron is made of a glomerulus and a tubule.
The two kidney lie on the posterior wall of the abdomen outside the peritoneal cavity. The kidneys are located on either side of spine. Left kidney is located a bit higher than your right kidney because the right kidney is below the liver.Kidney consist of two parts- Outer cortex and Inner medulla. Where is the kidney area,where are your kidneys located diagram,what side are your kidneys on,where is the kidney situated.