The Circulatory System

ACTIVITY Partner Up While resting find your partner’s pulse and count the number of beats for 15 sec. Record & Calculate heart rate in beats per minutes. While standing repeat steps in #1 March in place for 1 minute repeat step #1

What are we measuring? Series of pressure waves within an artery caused by the contractions of the left ventricle The pulse you feel is blood stopping and starting as it moves through your arteries

What are these contractions moving? BLOOD & LYMPH

The circulatory system What is the Circulatory System? Combination of the Cardiovascular System & Lymphatic System

The circulatory system What is it’s Function? A TRANSPORTATION SERVICE FOR CELLS THAT CARRIES TWO FLUIDS BLOOD AND LYMPH

Transportation service Transports Nutrients Hormones Gases Gets Rid of Wastes Helps maintain constant body temp

Cardiovascular System Central Organ The Heart Pumps through a network of vessels Beats more than 2.5 billion Size of a fist Made up of Blood Heart Blood vessels

Put your hand on your heart Did you place your hand on the left side of your chest? Actually the heart is located almost in the center of the chest, between the lungs

Muscle Cell that contracts in waves The Heart Muscle Cell that contracts in waves Four Chambers Vertically divided by the septum The right side pumps blood to the lungs The left side pumps blood to other parts of the body

Each side divided into an upper & lower chamber The Heart Each side divided into an upper & lower chamber Upper chamber is the atrium Lower chamber the ventricle (PUMP) Valves – flaps of tissue that only open in one direction.

The Heart Blood pressure- the force that exerts blood against the inside walls of a blood vessel Arteries- large muscular vessels that carries blood away from the heart

Circulation Two types of sub circulation systems Pulmonary circulation - blood travels between heart & lungs Systemic circulation – blood travels between the heat and all other body tissues

THE FLOW from heart Aorta (largest artery) – smaller arteries – smaller vessels – network of tiny vessels called capillaries Capillaries exchange between cells to heart – venules – vein large blood vessels

Did you Know? The aorta, the largest artery in the body, is almost the diameter of a garden hose. Capillaries, are so small that it takes ten of them to equal the thickness of a human hair. lub-DUB, lub-DUB, lub-DUB. Sound familiar? If you listen to your heart beat, you'll hear two sounds. These "lub" and "DUB" sounds are made by the heart valves as they open and close

Lymphatic System Small organ “lymph node” System Made up of Lymph One way system No pump Filters & fights disease Made up of Lymph Lymph nodes Lymph vessels

Transparent yellowish fluid DESCRIBE LYMPH Transparent yellowish fluid

Lymphatic System Function One way system that returns fluids collected in tissues “lymph” back to the blood stream

Lymphatic System Structure excess fluid in the tissues moves into tiny lymph vessels – lymph vessels merge to form larger vessels (similar to capillaries) – transported to lymph nodes like beads on a string. The lymph nodes filter the lymph trapping foreign particles and other debris. Stores white blood cells to fight disease

Lymph Node Examples Tonsils Thymus Spleen Bone marrow

Disease Heart disease is the leading cause of death in the United States and is a major cause of disability. Almost 652,091 people die of heart disease in the U.S. each year. About 27% of all U.S Heart disease is a term that includes several more specific heart conditions. The most common heart disease in the United States is coronary heart disease, which can lead to heart attack. Between 70% and 89% of sudden cardiac events occur in men Major risk factors for heart disease include high blood pressure, high blood cholesterol, tobacco use, diabetes, physical inactivity, and poor nutrition SOURCE: CDC Men and Heart Disease Fact Sheet

Additional Information American Heart Association http://www.americanheart.org/presenter.jhtml?identifier=1200000 CDC http://www.cdc.gov/DHDSP/library/fs_men_heart.htm