State the exact location of the following structures:

(a) Thyroid gland → Infront of neck below larynx.

(b) Dura mater → The outermost membrane covering the brain directly under skull.

(c) Amniotic fluid → In the space between the amnion and the embryo.

(d) Papillary muscles → Lower portion of the interior walls of the ventricles.

(e) Islets of Langerhans → Pancreas.