Mention the exact location of the following structures:

(i) Thylakoids are located in grana of chloroplast.

(ii) Organ of Corti is present in the middle cochlear canal of the ear.

(iii) Lenticels are present on the surface of old woody stems.

(iv) Bicuspid valve is located between left auricle and left ventricle.

(v) Loop of Henle runs in the medulla to turn back and to re-enter the cortex to continue into the next convoluted region of the tubule.