In connection with circulatory system, valves are present
Not only in heart and blood vessels of vertebrates and invertebrates, but in vertebrate lymphatics as well
Vertebrate heart only
Vertebrate heart and invertebrate hearts only
Vertebrate hearts, invertebrate hearts and their blood vessels
In which chamber of heart, more blood is present?
Definition / Explanation :
$(1)$ Semi lunar valve
‘Bundle of His’ is a part of which one of the following organs in humans?
Valves are necessary in veins but not in arteries because