The inter-ventricular septum:
a) makes a major contribution to cardiac contraction
b) makes a minor contribution to cardiac contraction
c) does not contribute to cardiac contraction
d) does not contract as it is composed of dense fibrous connective tissue
e) is only responsible in spreading the electrical signal

c) does not contribute to cardiac contraction

Explanation:

Inter-ventricular septum corresponds to the muscular wall or septum located in the lower portion of the heart. It has the function of separating the left ventricle from the right, so that there is no mixture of venous blood (poor in oxygen) with arterial (rich in oxygen). The inter-ventricular septum does not contribute to the contraction of the cardiac muscle, and its main function is to ensure that oxygenated blood does not mix with non-oxygenated blood. The  inter-ventricular septum is absent in fish and amphibians, partially present in non-crocodilian reptiles and present in crocodilian reptiles, birds and mammals.

the answer is "a.) well–developed vascular system."

explanation:

b) the inside picture would look at a very high temperature in a very low ph