Question

Read the statements regarding the cardiac system and choose the right option.
i. human heart is an ectodermal derivative
ii. mitral valve guards the opening between the right atrium and left ventricle
iii. SAN is located on the left upper comer of the right atrium
iv. stroke volume x heart rate = cardiac output

• A. i alone is correct
• B. i and ii alone are correct
• C. ii and iii alone are correct
• D. iv alone is correct
• E. ii and iv alone are correct

Answer 1

Answer: (D)

Human heart is mesodermal derivative. The opening between the right atrium and right ventricle is guarded by tricuspid valve whereas bicuspid or mitral valve guards the opening between left atrium and left ventricle. SAN or sino-atrial node is a patch of tissue present in the right upper corner of right atrium.