Download Circulatory System

HEART RATE LAB
• Heart Beat
• Measuring heart rate under
different conditions.
• Do Investigating claims on
your own.
CIRCULATORY
SYSTEM
THE CIRCULATORY
SYSTEM
• Takes 60 seconds for a blood cell to make
a complete circuit of the body
• 5.6 liters of blood being pumped at a time
• Your heart will beat 100,000 times today
= 2 liters
• 35 million beats a year
• Aorta- diameter of garden house, capillaries
as thin as a hair
= 1 liter
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 HEART
All 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
superior
vena cava
pulmonary
artery
aorta
pulmonary
vein
pulmonary
vein
coronary
artery
right atrium
inferior
vena cava
left
ventricle
right ventricle
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
Semilunar Valves
Bicuspid Valve
Tricuspid Valve
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