Change the following sentences into Passive​

1 The development of anatomy was greatly affected by Darwin's theory of evolution.

2 The theory of the two signaling systems was offered by I.P. Pavlov.

3 The gases are transported to and from tissue cells by the blood.

4 The skeleton is made up of the bones.

5 Contraction in skeletal muscles are stimulated by electrical impulses.

6 The thoracic cavity is bounded by the ribs laterally.

7 The spinal column is supported by many strong ligaments and muscles of the trunk.

8 The work of the heart was influenced by many factors.

9 The outer wall of the heart is created by three layers.

10 The right and left sides of the heart are separated by a wall called septum.