It would be heart. I hope this helps
Their mode of fertilization is external.
They lay eggs in the water and there is a chance of destruction of these gametes by water current if they are in less quantity.
So they lay more and more eggs in order to rule out the possibility of destruction of all eggs.
Thus at least some eggs are fertilized by sperm and produce zygote.
Explanation:
Elevated workplace or environmental noise can cause hearing impairment, tinnitus, hypertension, ischemic heart disease, annoyance, and sleep disturbance. ... Noise exposure has been known to induce noise-induced hearing loss, tinnitus, hypertension, vasoconstriction, and other cardiovascular adverse effects.
The Skeletal system in the body is in between the skin/muscle tissue, and the organs. Our bones offer protection to most of our vital organs.
ex: our skull protects our brain and our chest plate protects our heart and lungs.
