Lungs are enclosed by?

(A) Thoracic Cavity
(B) Pericardial Cavity
(C) Pleura membrane
(D) Coelom

Answer: (C) Pleura membrane
Lungs are enclosed by pleura membrane.

Pacemaker is a common name of:

(A) Atrio-ventricular node
(B) Sinoatrial Node
(C) Lymph Node
(D) Internodes

Answer: (B) Sinoatrial Node
Pacemaker is a common name of sinoatrial node.