Question

Question 1: Fill in the blanks:

a) Valves are__________________ in the arteries.

b) A mature red blood cell lacks_______________.

c) Heart is a muscular organ formed of ________________.

d) Human heart is a ____________ chambered organ.

e) The flow of blood from left auricle to left ventricle is controlled by _______________ valves​

Answer 1

1. Not present
2. Nucleus
3. Cardiac muscles
4. Four-chambered
5. The open Mitral valve