Answer:
I think that it is A. Smooth Muscles but i could be wrong
Explanation:
Smooth muscle, also called involuntary muscle, muscle that shows no cross stripes under microscopic magnification. It consists of narrow spindle-shaped cells with a single, centrally located nucleus. Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically. (Found on g o o g l e)
Cardiac muscle (or myocardium) makes up the thick middle layer of the heart. It is one of three types of muscle in the body, along with skeletal and smooth muscle. The myocardium is surrounded by a thin outer layer called the epicardium (AKA visceral pericardium) and an inner endocardium.
Skeletal muscles are attached to bones by tendons, and they produce all the movements of body parts in relation to each other. Unlike smooth muscle and cardiac muscle, skeletal muscle is under voluntary control.
Thoughts and feelings about yourself
At 18 weeks the baby can start to hear sound.
Deoxygenated blood from the body via the vena cava enters the right atrium of the heart. the right atrium pumps the blood via the trucuspid valve into the right ventricle. From the right ventricle, blood is pumped into the pulmonary trunk via the pulmonic valve to the lungs. Oxygenated blood from the lungs enters the left atrium via the pulmonary veins. The left atrium pumps the blood to the left ventricle via the mitral valve. The left ventricle pumps this blood via the aortic valve to the aorta which distribute the blood to the rest of the body
Vena cava - right atrium - tricuspid valve - right ventricle - pulmonary artery/trunk - lungs - pulmonary veins - left atrium - mitral valve - left ventricle - aortic valve - aorta - rest of body.
