Download - Heart Rate Lab
HEART RATE LAB• Heart Beat• Measuring heart rate underdifferent conditions.• Do Investigating claims onyour own.
CIRCULATORY SYSTEM
THE CIRCULATORY SYSTEM
• 5.6 liters of blood being pumped at a time
= 2 liters
= 1 liter
• Takes 60 seconds for a blood cell to make a complete circuit of the body
• Your heart will beat 100,000 times today
• 35 million beats a year
• Aorta- diameter of garden house, capillaries as thin as a hair
FUNCTIONS OF CIRCULATORY SYSTEM
• Transportation• Oxygen• Nutrients
• Removal• Wastes from tissues
• The “Blood Mobile”
WHAT’S IN YOUR BLOOD?• Plasma
• Liquid part of the blood • 90% water
• White Blood Cells• Fight infection • Engulf bacteria cells
• Red Blood Cells• Most common blood cells
• Hemoglobin transported• Carries oxygen
• Platelets• Cell fragments• Helps clot blood
BLOOD VESSELS• Artery “away”
• Blood pushed away from heart• Blood vessel where a pulse can be felt• Delivers oxygen-rich blood to capillaries• High pressure
• Capillaries• Smallest blood vessel• Exchange materials, from blood to tissues and tissues to blood
O2, CO2, waster, nutrients
• Veins• Contains valves
• Brings wastes to the heart and lungs• Low pressure
• Varicose Veins valves no longer work
THE HUMAN HEARTAll Muscle
YOU’VE GOTTA HAVE HEART• Heart failure is the leading cause of death in
men and women• ~ 800,000 Americans a year of a heart attack• ~ 500,000 Americans who have already had a
heart attack have another one every year• Heart disease costs in America ~ $108.9 billion
YOU’VE GOTTA HAVE HEART
• Risk Factors• Inactivity-53%• Obesity- 34%• High Blood Pressure- 32%• Cigarette Smoking- 21%
• High Cholesterol- 15%
• Diabetes- 11%
EXTERNAL VIEW
pulmonary artery
pulmonary vein
coronaryartery
left ventricle
right ventricle
inferior vena cava
right atrium
pulmonary vein
aorta
superiorvena cava
INTERNAL VIEW
Superior Vena Cava
Inferior Vena Cava
INTERNAL VEIW
Right Atrium
INTERNAL VIEW
Right Ventricle
INTERNAL VIEW
Pulmonary Arteries
INTERNAL VIEW
Left Pulmonary Veins
INTERNAL VIEW
Left Atrium
INTERNAL VIEW
Left ventricle
INTERNAL VIEW
Aortic arch
Aorta
INTERNAL VIEW
Bicuspid Valve
Tricuspid Valve
Semilunar Valves
Septum
NODES• Natural pacemakers• Sinoatrial Node (SV node or SA node)
• Cardiac muscle mass on top of right atrium• Primary generator regular electrical impulses of the heart• Controls pulse, sends it to AV node
• Atrioventricular Node (AV node)• Secondary response, controls contraction• Delays signal, prevents simultaneous contraction
• Artificial Pacemakers• Atrial Fibrillation• Electrical signals and impulses occurring in places other than the nodes• Prevents the right atrium from filling up with blood, body is deprived of
blood.
TYPES OF CIRCULATION• Two types
• Systemic (greater) Circulation• Pulmonary (lesser) Circulation
• Systemic • Part of circulation that carries oxygenated blood away
from heart to the rest of the body. • Which side of the heart pushes the blood out? • Which vessel carries oxygenated blood away?
TYPES OF CIRCULATION• Pulmonary circulation
• Blood flow between heart and lungs. • Primary job is to exchange O2 and CO2
• In this way, it keeps systemic circulation on track