Mention the exact location of the following :

(i) Testis are located in a thin-walled sac of skin called Scrotum.

(ii) Incus is located between Malleus and Stapes of ear ossicle which is found in the middle ear.

(iii) Thylakoids are located in grana of chloroplast.

(iv) Amniotic fluid is found in the amnion. It fills the space between amnion and foetus.

(v) It is located between the two cerebral hemispheres.