It can be used as a teaching of physical health knowledge of the visual aids,so as to deepen the understanding of the muscle in the human body. Size: 33*23*15cm/13*9*5.9in.Excellent Education tool for Students/teachers/professional use,preferred choice of experts. Smooth Muscle Is Also Known As The Striated Muscle. It Is Considered To Be A Primitive Muscle Of The Striated Muscle. This extremely fine Smooth Muscle Tissue Model is magnified about 10,000 times and shows an ultrastructural anatomical of a smooth muscle. Smooth Muscle Is Widely Distributed In The Human Digestive Tract,And Vascular And Urinary, Reproductive And Other Systems. In The Vertebrate Except The Myocardium, Most Of The Visceral Muscles Are Also Composed Of Smooth Muscle.