BODY SYSTEMS YOUR CIRCULATORY SYSTEM CIRCULATORY SYSTEM The

BODY SYSTEMS YOUR CIRCULATORY SYSTEM

CIRCULATORY SYSTEM The heart is the main organ of the circulatory system A group of organs and tissues that move essential supplies to the body cells and remove their waste products

CIRCULATORY SYSTEM Your circulatory system is made up of your heart, blood vessels, and blood. The body’s cells benefit from the circulatory system through cell respiration The process in which the body’s cells are nourished and energized

FUNCTIONS Blood picks up nutrients from the digestive system and oxygen from the lungs.

FUNCTIONS Blood delivers nutrients and oxygen to the body’s cells.

FUNCTIONS Cells use the nutrients and oxygen.

FUNCTIONS Cells create waste products, including carbon dioxide.

FUNCTIONS Blood picks up wastes and delivers them to the liver, kidneys, and lungs for removal.

The Flow of Blood

Trace your blood drop Superior or Inferior Vena Cava Right Atrium Right ventricle Veins Pulmonary artery Capillaries Lungs Arteries Pulmonary vein Aorta Left Ventricle Left Atrium

Chambers of the heart Your heart has 4 chambers • Right Atrium • Left Atrium • Right Ventricle • Left Ventricle • A wall of tissue separates the right & left atria called the septum along with the right & left ventricles

Chambers of the heart • The right atrium works as the natural pacemaker for the rest of the heart • Small electrical impulses force the atrium to contract therefore allowing blood to be pumped into the ventricles • Blood is then pumped out of the heart

Chambers of the heart • When blood is flowing it can only flow one way • Once blood is pumped the valves close not allowing blood to pump back • The sound that you hear when your heart is beating is the sound of the valves closing

Circulation of the heart • Blood that has been deoxygenated but has carbon dioxide & waste is pumped back to the heart by 2 large blood vessels called the vena cava • Deoxygenated blood enters the right atrium & is transferred to the right ventricle

Circulation of the heart • The blood is then pumped from the left atrium into the left ventricle • Blood is then pumped out of the heart & into the rest of the body by way of the large artery called the aorta

BLOOD LIQUID • Called plasma • Composed of 92 percent water

BLOOD SOLID • Composed of mostly red blood cells and cell parts called platelets. • Red blood cells carry oxygen to cells and carbon dioxide away from them. • White blood cells carry germ fighters from the immune system to needy areas of the body. • Platelets help clot blood at the site of a wound.

BLOOD VESSELS Three types of blood vessels are arteries, veins, and capillaries.

BLOOD VESSELS arteries Blood vessels that carry blood away from the heart to parts of the body

BLOOD VESSELS capillaries Tiny blood vessels that connect the veins and arteries to the body’s cells

BLOOD VESSELS veins Vessels that carry blood from the body back to the heart

GIVING AND RECEIVING BLOOD Blood can be replaced by means of a transfusion. Doctors need to make sure that the blood type of the injured person matches the blood type of the donated blood.

TYPES OF BLOOD

GIVING AND RECEIVING BLOOD The Food and Drug Administration (FDA) is responsible for regulating organizations that collect and distribute donated blood. All donated blood is tested for HIV and other diseases.

PROBLEMS Arteriosclerosis Hypertension Heart Attack Stroke Problems of the Circulatory System Anemia Leukemia

Problems in the Circulatory System • Congenital Heart Defects - heart problems that babies have at birth. • Arrhythmia - problems in the rhythm of the heartbeat. • Cardiomyopathy - a long-lasting disease that causes the heart muscle to become weakened. • Coronary Heart Disease - the most common heart disorder in adults. • Hypercholesterolemia - high cholesterol • Hypertension - high blood pressure • Rheumatic heart disease

CARE EXERCISE DON’T SMOKE EAT NUTRITIOUS FOOD MANAGE STRESS