The main responsible for the delay among the atrial and
ventricular contractions is the action potential conduction velocity of the AV
node cells. If the atria and ventricles contract simultaneously, atria cannot
give any help in filling the ventricles, which is needed, especially in those
with stiff ventricles as in the elderly. Hence atria have to contract first and
then the ventricles.
Cancer and Tumors...
........ Hope it helps, Have a good rest of the day:)
Answer:
Increased fitness of large-beaked birds, leading to natural selection
(Why: Birds with larger beaks are better able to survive in the new enviornment)
Hope this help
Have a wonderful day!!
Answer:
The answer is D. I hope this was helpful!
Explanation:
Answer:
i almost can see the thning
Explanation:
