Explanation: The cardiovascular system is responsible for transporting oxygen and nutrients to various parts of the body.

Explanation: The left atrium receives oxygenated blood from the lungs through the pulmonary veins.

Explanation: The heart is made up of cardiac muscle tissue, which is unique to the heart and allows it to contract and pump blood.

Explanation: Valves in the heart ensure one-way blood flow and prevent the backflow of blood between chambers.

Explanation: Arteries carry oxygenated blood away from the heart to various parts of the body.

Explanation: Pacemaker cells in the sinoatrial (SA) node of the heart initiate electrical impulses that regulate the heart rate.

Explanation: The aorta is the largest artery in the human body and carries oxygenated blood from the heart to the rest of the body.

Explanation: The average resting heart rate for a healthy adult ranges from 60 to 100 beats per minute.

Explanation: A heart attack is medically referred to as a myocardial infarction, which occurs when there is a blockage in the blood flow to the heart muscle.

Explanation: The inferior vena cava is a large vein that carries deoxygenated

blood from the lower body back to the right atrium of the heart.

Explanation: Hemoglobin is a protein in red blood cells that binds to oxygen in

the lungs and carries it to tissues throughout the body.

Explanation: Arteries help regulate blood pressure through vasoconstriction and vasodilation, adjusting the diameter of blood vessels to control the flow of blood.

Explanation: The atria of the heart receive blood from the veins and serve as holding chambers before the blood is pumped into the ventricles.

Explanation: The correct pathway of blood flow through the heart is from the right atrium to the right ventricle, then to the pulmonary artery, lungs, pulmonary veins, left atrium, and finally to the left ventricle.

Explanation: Smoking is a well-known risk factor for cardiovascular disease, as it can damage blood vessels, increase blood pressure, and promote the development of atherosclerosis.

Explanation: Diastole is the period of relaxation and filling of the heart chambers when the heart is at rest.

Explanation: The Bundle of His carries electrical signals from the atrioventricular (AV) node to the ventricles, allowing coordinated contraction of the heart.

Explanation: Capillaries are tiny, thin-walled blood vessels where the exchange of oxygen, nutrients, and waste products occurs between the blood and surrounding tissues.

Explanation: Hypertension refers to high blood pressure, a condition where the force of blood against the artery walls is consistently too high.

Explanation: The coronary arteries deliver oxygen, nutrients, and other essential substances to the heart muscles.

Atherosclerosis is the buildup of fats, cholesterol and other substances in and on the artery walls. This buildup is called plaque.

The prefix a- in medical terminology often means without or not. The root of the term is rhythm, which refers to a regular, repeated pattern of movement or sound. In this case, it implies a deviation from the normal or regular rhythm, particularly in the context of the heartbeat.

Endarterectomy is done to remove fatty buildup (plaque) from one of the carotid arteries.

The alveoli collect oxygen from inhaled air and transfer it to the deoxygenated and carbon dioxide-rich blood at the pulmonary capillaries. Simultaneously, the carbon dioxide waste is transferred from the deoxygenated blood into the lungs, to be exhaled.

The aorta is the main and largest artery in the human body, originating from the left ventricle, branching upwards immediately after, and extending down to the abdomen.

Venul- is the root which denotes venules (small veins). -itis is a suffix which indicates the inflammation. Therefore, venulitis means the inflammation of venules.

Angio- means vessel(s); -plasty means surgical preparation. Angioplasty is a procedure used to open blocked coronary arteries caused by coronary artery disease. It restores blood flow to the heart muscle without open-heart surgery (Source: hopkinsmedicine)

Ischemia is the term used to describe the inadequate blood supply to a part of the body due to the narrowing or blockage of blood vessels. It can lead to tissue damage or even organ failure.

Cardiomyopathy is a term used to describe diseases of the heart muscle. It can lead to the enlargement, thickening, or stiffening of the heart chambers or walls, impairing the heart's ability to pump blood effectively.

The root words "angio" or "vaso" refer to blood vessels. They are commonly used in medical terms related to the circulatory system.

The suffix -stenosis is used to indicate the narrowing of a structure or passage. For example, aortic stenosis refers to the narrowing of the aortic valve.

Vasoconstriction refers to the narrowing of blood vessels caused by the contraction of smooth muscles in their walls.

The SA node is responsible for initiating and regulating the electrical impulses that control the heart rate. It acts as the heart's natural pacemaker.

SVC stands for superior vena cava, which carries deoxygenated blood from the upper body to the heart, while IVC stands for inferior vena cava, which carries deoxygenated blood from the lower body to the heart.

The tricuspid valve is located between the right atrium and the right ventricle in the heart.

Vasodilation refers to the widening or dilation of blood vessels, leading to increased blood flow. 

The AV node acts as a bridge between the atria and the ventricles, conducting electrical impulses from the atria to the ventricles, allowing for coordinated contraction.

The bicuspid valve, also known as the mitral valve, is located between the left atrium and the left ventricle in the heart.

The pulmonary valve is located between the right ventricle and the pulmonary artery, allowing blood to flow from the heart to the lungs.

The valve located between the left ventricle and the aorta is called the aortic valve. It allows blood to flow from the left ventricle into the aorta, which then distributes oxygenated blood to the rest of the body.