[Answer] ___________ are structures that allow for one-way blood flow through the heart.

Answer: Valves
___________ are structures that allow for one-way blood flow through the heart.
The heart valves and the chambers are lined with endocardium. Heart valves separate the atria from the ventricles or the ventricles from a blood vessel. Heart valves are situated around the fibrous rings of the cardiac skeleton. The valves incorporate flaps called leaflets or cusps similar to a duckbill valve or flutter valve which are pushed open to allow blood flow and which then close together to seal and prevent backflow. The mitral valve has two cusps whereas the others have three. There are nodules at the tips …
Cardiac muscle tissue or myocardium forms the bulk of the heart . The heart wall is a three-layered structure with a thick layer of myocardium sandwiched between the inner endocardium and the outer epicardium (also known as the visceral pericardium). The inner endocardium lines the cardiac chambers covers the cardiac valves and joins with the endothelium that lines the blood …
The first is the foramen ovale which shunts blood from the right atrium to the left atrium. The second is the ductus arteriosus which shunts blood from the pulmonary artery …
The heart is the driver of the circulatory system pumping blood through rhythmic contraction and relaxation. The rate of blood flow out of the heart (often expressed in L/min) is known as the cardiac output (CO). Blood being pumped out of the heart first enters the aorta the largest artery of the body.
The blood vessels are the components of the circulatory system that transport blood throughout the human body. These vessels transport blood cells nutrients and oxygen to the tissues of the body. They also take waste and carbon dioxide away from the tissues. Blood vessels are needed to sustain life because all of the body’s tissues rely on their functionality. There are five types of blood vessels: the arteries which carry the blood away from the heart; the arterioles …

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