Human cardiovascular system, organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the blood is propelled by a muscular heart.

The cardiovascular system refers to the heart (cardio) and blood vessels (vascular). The circulatory system is a more general term encompassing the blood, blood vessels, heart, lymph, and lymph vessels.

The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in …

5 Major Functions of the Cardiovascular System

• The cardiovascular system, also known as the circulatory system, includes the heart, arteries, veins, capillaries and blood.
• Supplying oxygen to the body is the most essential function of the cardiovascular system.
• Delivering nutrients to the body is another critical function of the cardiovascular system.

The main function of the cardiovascular system is therefore to maintain blood flow to all parts of the body, to allow it to survive. Veins deliver used blood from the body back to the heart.

What are the four main functions of the heart?

• Pumping oxygenated blood to the other body parts.
• Pumping hormones and other vital substances to different parts of the body.
• Receiving deoxygenated blood and carrying metabolic waste products from the body and pumping it to the lungs for oxygenation.
• Maintaining blood pressure.

heart and circulatory system

What Are Cardiovascular Diseases?

• Abnormal heart rhythms, or arrhythmias.
• Aorta disease and Marfan syndrome.
• Congenital heart disease.
• Coronary artery disease (narrowing of the arteries)
• Deep vein thrombosis and pulmonary embolism.
• Heart attack.
• Heart failure.
• Heart muscle disease (cardiomyopathy)

The main components of the cardiovascular system are the heart, blood vessels, and blood. Each of these components is shown in Figure 17.2.

The cardiovascular system includes the heart (cardio) and blood vessels (vascular). The cardiovascular system is responsible for pumping and circulating the blood. The musculoskeletal system includes the bones, muscles, ligaments, tendons, and joints, which support and move the body.

The walls of the heart are composed of three layers:

• Epicardium – the outer layer.
• Myocardium – the middle, muscular layer.
• Endocardium – the inner layer.

The heart is composed of three layers: the epicardium (outer layer) which prevents excess expansion or movement of the heart, the myocardium (middle layer) which initiates contractions driving the cardiac cycle, and the endocardium (inner layer) that lines the cavities and valves.

The wall of the heart separates into the following layers: epicardium, myocardium, and endocardium. These three layers of the heart are embryologically equivalent to the three layers of blood vessels: tunica adventitia, tunica media, and tunica intima, respectively.

The epicardium is a thin layer of elastic connective tissue and fat that serves as an additional layer of protection from trauma or friction for the heart under the pericardium. This layer contains the coronary blood vessels, which oxygenate the tissues of the heart with a blood supply from the coronary arteries.

The Layers of the Heart Wall The heart wall is composed of connective tissue, endothelium, and cardiac muscle. It is the cardiac muscle that enables the heart to contract and allows for the synchronization of the heartbeat. The heart wall is divided into three layers: epicardium, myocardium, and endocardium.

The epicardium is the outermost layer of the heart, formed by the visceral layer of the pericardium. It is composed of connective tissue and fat.

The myocardium is functionally the main constituent of the heart and the thickest layer of all three heart layers. It is a muscle layer that enables heart contractions. Histologically, the myocardium is comprised of cardiomyocytes.

The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium….

The thickness of the myocardium of the four chambers varies according to function. The atria are thin-walled because they deliver blood into the adjacent ventricles and the ventricles are equipped with thick muscular walls because they pump blood over greater distances.

The pericardium is a thin sac that surrounds your heart. It protects and lubricates your heart and keeps it in place within your chest. Problems can occur when the pericardium becomes enflamed or fills with fluid.

The muscle layer of the heart is termed the myocardium and is made up of cardiomyocytes. The myocardium is found in the walls of all four chambers of the heart, though it is thicker in the ventricles and thinner in the atria.

The wall of the heart consists of three distinct layers—the epicardium (outer layer), the myocardium (middle layer), and the endocardium (inner layer).

The upper two chambers are called atria (singular: atrium) and the lower two are known as ventricles (singular: ventricle). Muscular walls, called septa or septum, divide the heart into two sides. On the right side of the heart, the right atrium and ventricle work to pump oxygen-poor blood to the lungs.