Saved Bookmarks
| 1. |
Hey! Why does the heart make a lub-dub sound? Please explain in detail. Not just contraction and relaxation... |
|
Answer» The" lub" is the sound of the tricuspid and mitral valves closing. The" DUB" is the sound of the AORTIC and pulmonary valves closing. ... The second sound OCCURS as a result of CLOSURE of the PULMONIC and aortic valves. |
|