Transcript What are the functions of the circulatory system?

2.02 Understand the
functions and disorders of the
circulatory system
2.02 Understand the functions and
disorders of the circulatory system
Essential questions:
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What are the functions of blood?
What are some disorders of the blood?
How are blood disorders treated?
How do you relate the body’s use of nutrients to the blood?
What are the functions of the circulatory system?
What are some disorders of the circulatory system?
How are disorders of the circulatory system treated?
How do you relate the body’s use of nutrients to the circulatory
system?
2.02 Understand the functions and disorders
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What are the functions of blood?
Transportation
 What does the blood
transport?- Oxygen ,
CO2,hormones, nutrients,
waste products
 Why is this an important
function? helps remove
harmful wastes
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What are the functions of blood?
Regulation
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How does the blood regulate heat?
Absorbs heat generated by the muscles,
and spreading it to the rest of the body
How does the blood regulate acid/base
balance? Ensures pH and electrolytes
values are within normal Parameters for
proper cell functioning
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What are the functions of blood?
Protection
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What function of the blood serves to
protect the body? Fights infection
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What is the relevance to health?
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Functions of the blood components
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Plasma
Erythrocytes
Leukocytes
Thrombocytes
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Plasma
Plasma
Cellular
elements
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circulatory system
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Erythrocytes
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What are the functions
of erythrocytes? Carry
oxygen and CO2
hemo= blood
globin= protein
What is the function of
hemoglobin? They
transport O2 and CO2
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Erythrocytes
Starts here
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hemolysis
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What is it? When RBC’s
rupture releasing
hemoglobin into plasma
Where does it occur? In
the veins
What is the lifetime of an
erythrocyte? About 120
days
What happens to old
erythrocytes? Broken
down by liver
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Rh factor
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Leukocytes
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What is the function of
leukocytes?
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Compare leukocytes to
erythrocytes.
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Leukocytes
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Agranulocytes
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Lymphocytes
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Monocytes
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Leukocytes
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Granulocytes
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Neutrophils
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Eosinophils
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Basophils
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Inflammation
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Tissue reaction to injury that includes
Swelling and reddening due to an increase blood flow to
the area
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Thrombocytes
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What is the composition of
thrombocytes?
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What is their function?
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Thrombocytes
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Blood types
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Blood types
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Compare blood types. (antigen/antibodies)
A
B
AB
O
Who can receive
type O blood?
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Rh factor
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Blood Disorders
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Anemia
Review the symptoms of
anemia.
Discuss why these
symptoms occur.
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Anemia
Blood condition in which there is a less than normal number of
RBC’s, or deficient hemoglobin.
Symptoms: pale skin, pale mucous membranes and nail beds
Fatigue(tired) and muscle weakness, SOB(shortness of breath) some
patients may have chest pain due to decreased levels of oxygen being
supplied to the heart
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Why to people experience these symptoms?
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Blood disorders
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Blood disorders
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Contusion verses hematoma
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Contusion occur when a direct blow breaks
blood vessels beneath the skin causing a
pool of blood to form under the skin
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Hematoma- collection of blood outside of a
blood vessel
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Blood disorders
Review the symptoms of hemophilia.
Excessive bleeding after trauma
Discuss why these symptoms occur.
plasma has too little of the proteins
that help our blood to clot
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Blood disorders
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Leukemia
What is leukemia?
Review the symptoms of
leukemia.
Discuss why these
symptoms occur.
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leukemia
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Leukemia is a type of cancer of the blood
characterized by immature white blood cells
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Blood disorders
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Multiple myeloma
What is multiple myeloma?
Multiple myeloma is cancer that starts in the plasma cells
in bone marrow.
What are the symptoms?
How is it treated?
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Blood disorders
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Polycythemia
What is polycythemia?
What are the symptoms?
How is it treated?
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Blood disorders
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Septicemia
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Blood disorders
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Sickle cell anemia
What is sickle cell anemia?
What are the symptoms?
How is it treated?
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What are the
functions of
the heart?
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Functions of the heart
Did you know?
At rest, 2 ounces of blood
is circulated with each heart beat.
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Functions of the heart
It’s a PUMP
What do pumps do?
How does this relate to heart function?
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Hear the beat!
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Blood Pressure FYI
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Blood pressure is the surge of blood when heart
pumps creates pressure against the walls of the
arteries
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SYSTOLIC PRESSURE
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Measured during the contraction phase
DIASTOLIC PRESSURE
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Measured when the ventricles are relaxed
What is the normal range of
blood pressure for an adult?
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Functions of the heart
It’s a PUMP
What makes the pump work?
It’s
electric!
Explain the electrical
activity of the heart.
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It’s electric!
Discuss the function of
the heart’s conduction
system.
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Electrocardiogram
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EKG or ECG
SYSTOLE = contraction phase
DIASTOLE = relaxation phase
Baseline of an EKG is a flat line:
P = Atrial contraction
QRS = Ventricular contraction
T = Ventricular relaxation
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Functions of the heart
It’s a PUMP
What makes the pump work?
It’s
electric!
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Functions of the heart
Transportation
What does the heart transport?
What is involved in the transportation
process?
How is this a circulatory system
function?
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The transportation process
Discuss systemic circulation
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The transportation process
Right side
Superior vena cava
Inferior vena cava
Right atrium
Tricuspid valve
Right Ventricle
Pulmonary valve
Pulmonary artery
Left Side
Pulmonary vein
Left atrium
Bicuspid valve
Left ventricle
Aortic valve
Aorta
Body
Lungs CO2 and O2
exchange
(Schematic of systemic circulation)
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The transportation process
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Discuss
cardiopulmonary
circulation
Compare
Systemic Circulation
To
Cardiopulmonary Circulation
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Vessels of the circulatory system
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ARTERIES
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What are the functions of
arteries?
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What are the characteristics of
arteries?
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Which direction do arteries
flow?
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Vessels of the
circulatory system
Describe arterial blood.
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Vessels of the circulatory system
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VEINS
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What is the function of
arteries?
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What are the characteristics
of arteries?
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Which direction do arteries
flow?
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Compare arterial and venous
blood.
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Vessels of the
circulatory system
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Vessels of the circulatory system
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Vessels of the circulatory system
Capillaries
What is the function of capillaries?
What happens if this action is obstructed?
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Remember Pulse Sites?
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Where do they come from?
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Circulatory disorders
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Aneurysm
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Circulatory disorders
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Angina pectoris
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Circulatory disorders
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Arrhythmia
Is any change from normal
heart rate or rhythm
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BRADYCARDIA
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Slow heart rate (<60 beats
per minute)
TACHYCARDIA
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Rapid heart rate (>100
beats per minute)
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Circulatory disorders
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Arteriosclerosis
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Circulatory disorders
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Atherosclerosis
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Circulatory disorders
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Coronary artery disease
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Circulatory disorders
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Hypertension
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What is hypertension?
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What factors influence the
development of
hypertension?
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How is it treated?
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Why is it called the “silent
killer?”
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Circulatory disorders
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Heart failure
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Circulatory disorders
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Murmurs
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Circulatory disorders
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Myocardial infarction
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Circulatory disorders
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Peripheral vascular disease
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Circulatory disorders
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Pulmonary edema
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Circulatory disorders
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Transient ischemic attack
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Circulatory disorders
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Varicose veins
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Prevention
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Wear sunscreen
Elevate legs when resting
Wear elastic support stockings
Eating fiber diets
Exercise
Weight control
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Circulatory disorders
Leading Causes of Death:
The Impact of Circulatory Disorders
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