1. 2
   4
2. 10
   20

The upper chambers receive incoming blood and the lower chambers are more muscular, and pump blood out of your heart.

1. atrium
   ventricle
2. vein
   artery

The two upper cavities of the heart are called atria (plural for atrium). Deoxygenated blood is received into the right atrium, and the left atrium receives oxygenated blood..

1. atrium
   ventricle
2. vein
   artery

Blood from the right atrium enters the right ventricle and pumps it into the lungs, and blood from the left atrium enters the left ventricle where it gets pumped into the circulatory system.

1. aorta
   veins
2. artery
   capillary

The aorta carries oxygenated blood from the heart to all the tissues in the body.

1. aorta
   vein
2. artery
   capillary

The average adult body has about 10 billion capillaries, which connect arteries and veins.

1. 1 pint
   1.5 gallons
2. 10 gallons
   10 liters

It is estimated that the volume of blood in a human body is roughly 7 percent of body weight.

1. cancer
   car accidents
2. heart disease
   stroke

Heart disease is a term that encompasses all types of heart-related infections, irregularities, and birth defects including heart failure, coronary artery disease, arrhythmias, and angina .

1. none
   100,000
2. 610,000
   1,000,000

Each year, 1 in every 4 deaths in the United States is due to heart disease.

1. eating unhealthy
   eating healthy
2. lack of exercise
   smoking

High cholesterol, high blood pressure, and diabetes can also increase your risk for developing heart disease.

1. cancer
   coronary artery disease
2. hyperthermia
   torn muscle

The coronary artery is important for supplying the heart with blood. If it is blocked or narrowed, coronary artery disease can occur. This is the most common cause of heart disease.

1. atherosclerosis
   stroke
2. apoptosis
   cancer

Damage to the lining of the blood vessel by high blood pressure, smoking, or high cholesterol can lead to the formation of plaques in your arteries that can clog the way for blood.

1. celery
   cheese
2. hamburgers
   cholesterol deposits

Plaques start as a fatty streak on the inside of the blood vessel, and can progress to a calcified plaque.

1. liver failure
   kidney damage
2. high blood pressure
   crow's feet

Also called hypertension, high blood pressure is defined as a blood pressure above 140/90. A healthy blood pressure is generally considered at or below 120/80.

1. arrhythmia
   palpitation
2. shock
   broken

Arrhythmia refers to any change in the electrical impulses of the heart that deviate from the normal sequence. This can lead to the inability of the heart to pump blood efficiently.

1. numbness
   stroke
2. peripheral artery disease
   heart attack

Peripheral artery disease most commonly occurs in the legs.

1. seizure
   heart attack
2. stroke
   anemia

A stroke is a kind of "brain attack" - the cells of the brain can die because if blood flow is cut off, then the cells do not receive oxygen and cannot survive.

1. heart attack
   stroke
2. cancer
   pulled muscle

A type of ischemic stroke resulting from a blockage in the blood vessels that supply blood to the brain is called a cerebral infarction.

1. cyanotic
   non-cyanotic
2. blue
   bruised

The word "cyan" comes from the Greek word for blue: kyanós.

1. arrythmia
   congestive heart failure
2. stroke
   ischemia

There are two types of heart failure, diastolic and systolic.

1. cannot fill
   cannot pump
2. breaks
   shrinks

In diastolic heart failure, the muscle of the left ventricle has become stiff and cannot relax, resulting in an inability to fill with blood properly.

1. cannot fill
   cannot pump
2. breaks
   shrinks

In systolic heart failure, the left ventricle cannot contract normally, so enough blood cannot get pushed into circulation and maintain a healthy body.

1. a flightless bird
   candy
2. chest pain
   stroke

Angina is chest pain caused by a lack of oxygen-rich blood flow to the heart. It can feel like pressure in your chest or indigestion.

1. stroke
   myocardial infarction
2. arrhythmia
   cancer

The myocardium is the muscular tissue of the heart, and an infarction is the obstruction of the blood supply.

1. aneurysm
   helium balloon
2. heart
   stroke

Aneurysms can occur in any blood vessel, and carry a risk of life-threatening rupture.

1. stroke
   cancer
2. myocardial infarction (heart attack)
   anemia

Studies have shown that people who live alone are twice as likely to have a heart attack compared to people who live with others.

1. stroke
   cardiac arrest
2. cancer
   childbirth

Cardiac arrest occurs when the heart suddenly stops pumping as a result of an electrical problem in the heart. This is different from a myocardial infarction (heart attack).

1. arteries
   congential heart disease
2. veins
   eyes

Congenital means present from birth, and can be inherited or acquired.

1. vitamin C
   insulin
2. nitrates (nitroglycerin)
   omega-3 fatty acids

Nitrates, commonly taken in the form of nitroglycerin, are used to relieve symptoms of angina, such as chest pain or pressure.

1. adipocytes
   myocytes
2. fibroblasts
   endothelium

Cardiac myocytes (the cells of your heart muscle) are dependent on the blood and electrical supply to coordinate the contractions of cells to make your heart pump properly.

1. catheter
   thermometer
2. fm radio
   pacemaker

Low-energy electrical pulses generated by a pacemaker will prompt the heart to beat at a normal rate.

1. Adenine
   Caffeine
2. Lipids
   Nicotine

Lipids are naturally occurring molecules that function to store energy and acting as structural components of cell membranes, among other things.

1. Anemia
   Hyperlipidemia
2. Hyperthyroidism
   Autoimmunity

It is important to make healthy diet choices and increase exercise to start lowering your high cholesterol.

1. Olestra
   HDL
2. LDL
   Triglycerides

Exercise and moderate consumption of alcohol raise your HDL levels (which stands for high density lipoprotein), whereas obesity and smoking decrease your HDL levels.

1. Omega-3 fatty acids
   HDL
2. LDL
   Triglycerides

LDL, which stands for low density lipoprotein, mobilizes and deposits cholesterol to the tissue, where it can contribute to plaque formation and progress to heart disease.

1. fish
   potato chips
2. french fries
   cheesburger

Omega-3 fatty acids are abundant in fish oils and are beneficial, whereas (trans)unsaturated fats produced by artificial hydrogenation of polyunsaturated oils (used in baked goods and margarine) adversely affect cholesterol profiles.