ANATOMY

Detailed explanation-1: -The movements your muscles make are coordinated and controlled by the brain and nervous system. The involuntary muscles are controlled by structures deep within the brain and the upper part of the spinal cord called the brain stem.

Detailed explanation-2: -The smooth muscle cell directly drives the contraction of the vascular wall and hence regulates the size of the blood vessel lumen.

Detailed explanation-3: -Arteries contain smooth muscle cells, which contract and relax to change the diameter of blood vessels, controlling blood flow to ensure that cells get the correct amount of oxygen and nutrients.

Detailed explanation-4: -Cardiac muscle tissue is one of the three types of muscle tissue in your body. The other two types are skeletal muscle tissue and smooth muscle tissue. Cardiac muscle tissue is only found in your heart, where it performs coordinated contractions that allow your heart to pump blood through your circulatory system.

Detailed explanation-5: -Smooth muscles regulate the flow of blood through arteries, arterioles, and veins, where they control the size of the lumen of the vessel.