which wall of the uterus is made of smooth muscle
Myometrium The myometrium is the middle layer of the uterine wall, consisting mainly of uterine smooth muscle cells (also called uterine myocytes[1]), but also of supporting stromal and vascular tissue.[2] Its main function is to induce uterine contractions.
Pericardium The fibrous pericardium is the most superficial layer of the pericardium. It is made up of dense and loose connective tissue,[2] which acts to protect the heart, anchoring it to the surrounding walls, and preventing it from overfilling with blood. It is continuous with the outer adventitial layer of the neighboring great blood vessels.