- How It Works
- Related Diseases
- Disease Prevention
The circulatory system consists of three main parts:
- Blood vessels
It also has three circuits that work together to circulate blood throughout the body:
- Pulmonary: Carries deoxygenated blood from the heart to lungs, then returns oxygen-filled blood to the heart.
- Systemic: Transports blood with oxygen, nutrients, and hormones from the heart to the rest of the body, then returns deoxygenated blood to the heart.
- Coronary: Supplies oxygenated blood to the heart muscle, then returns oxygen-lacking blood to the lungs for oxygen supply.
What does the circulatory system do?
The heart pumps blood throughout the body through a network of arteries and veins in a continuous cycle. The cardiovascular system is responsible for transporting oxygen, nutrients, and hormones to muscles, tissues, and organs.
It also removes waste products, such as:
How does the circulatory system work?
Blood vessels along with the heart and lungs continuously circulate blood through your body:
- The right ventricles (lower chamber of the heart) sends deoxygenated blood to the lungs through the pulmonary artery.
- Blood cells absorb oxygen from the lungs.
- Pulmonary veins transport oxygenated blood from the lungs to the left atrium (upper chamber of the heart).
- The left atrium transports oxygenated blood to the left ventricles, which pump blood to different muscles, tissues, and organs through the arteries.
- The blood carries oxygen, hormones, and nutrients and takes waste products from organs.
- The veins carry deoxygenated blood and carbon dioxide back to the heart and transport blood to the lungs.
- The lungs get rid of the carbon dioxide through exhaling.
What are diseases of the circulatory system?
- Aneurysm: Occurs when the artery wall weakens and enlarges; the most common aneurysms include:
- High blood pressure: Occurs when the force exerted by the blood against the blood vessel walls increases. High blood pressure can increase the risk of:
- Atherosclerosis: Occurs when fats and other substances form plaques on the artery walls, which can harden or narrow the arteries. Atherosclerosis increases the risk of the following:
- Venous disease: Affects the veins of the lower body, causing conditions such as varicose vein and deep vein thrombosis.
- Arteritis: Inflammation of the small- or large-caliber blood vessels due to autoimmune processes.
How can you prevent diseases of the circulatory system?
Lifestyle changes can help prevent diseases of the circulatory system:
Health Solutions From Our Sponsors
Top What Are the 3 Parts of the Circulatory System Related Articles
Healthy Eating: Foods That Help Increase Blood Flow CirculationGood blood flow circulation occurs when you eat the right foods. Choose cayenne pepper, beets, berries, fatty fish, pomegranate, garlic, walnuts, grapes, turmeric, spinach, and citrus fruit to keep blood flowing.
High Blood Pressure (Hypertension)
High blood pressure (hypertension) is a disease in which pressure within the arteries of the body is elevated. About 75 million people in the US have hypertension (1 in 3 adults), and only half of them are able to manage it. Many people do not know that they have high blood pressure because it often has no has no warning signs or symptoms.
Systolic and diastolic are the two readings in which blood pressure is measured. The American College of Cardiology released new guidelines for high blood pressure in 2017. The guidelines now state that blood normal blood pressure is 120/80 mmHg. If either one of those numbers is higher, you have high blood pressure.
The American Academy of Cardiology defines high blood pressure slightly differently. The AAC considers 130/80 mm Hg. or greater (either number) stage 1 hypertension. Stage 2 hypertension is considered 140/90 mm Hg. or greater.
If you have high blood pressure you are at risk of developing life threatening diseases like stroke and heart attack.
REFERENCE: CDC. High Blood Pressure. Updated: Nov 13, 2017.
High Blood Pressure & BodyHigh blood pressure puts you at risk for a number of other conditions. Here's what to look out for.
High Blood Pressure Drugs (Hypertension)High blood pressure (hypertension) medications include drugs from a variety of different drug classes and types. ACE inhibitors, ARB (angiotensin receptor blockers), beta blockers, calcium channel blockers (CCBs), diuretics, alpha-blockers, alpha-beta blockers. Clonidine (Catapres) and minoxidil also are drugs prescribed for the treatment of high blood pressure. Side effects, warnings and precautions, safety information, and pregnancy and breastfeeding safety information should be reviewed prior to taking any medication.
HBP QuizTake this quiz and test your IQ of high blood pressure (hypertension), the cardiovascular disease that causes most strokes and heart attacks. How are dizziness, snoring, and gout related to HBP? Find the answer and learn how medical treatments and lifestyle adjustments fight this common problem.
Stroke vs Aneurysm (Differences and Similarities)A stroke or "brain attack" is caused because blood flow to an area of the brain has been cut off by a blood clot or by a weakened or damaged blood vessel (for example, head trauma). The damaged area of the brain dies, which results in loss of function like speech capabilities, muscle movement, or muscles of an extremity like an arm or leg is reduced or lost completely. An aneurysm is a weakness in an artery wall. This weakness in the wall causes the artery to widen or balloon out, and then they rupture or break open.
What Are Human Blood Vessels?Blood vessels are small tube-like structures through which blood circulates throughout the human body. The blood vessels transport oxygen and nutrients to the tissues and organs and remove carbon dioxide and waste away from the tissues and organs.
What Is the Difference Between Atherosclerosis and Arteriosclerosis?Arteriosclerosis is a broader term for the condition in which the arteries narrow and harden, leading to poor circulation of blood throughout the body. Atherosclerosis is a specific kind of arteriosclerosis, but these terms are often used interchangeably. Both conditions lead to decreased blood flow to other parts of the body. Atherosclerosis is a progressive disease, which may either start in childhood or late adulthood.
What Triggers Temporal Arteritis and Is It Serious?Temporal arteritis is a rare but serious autoimmune disorder. Learn the critical early signs of temporal arteritis, how temporal arteritis is diagnosed, and how temporal arteritis can be successfully treated.