The Cardiovascular System: An Overview
•
Carries blood
throughout the body
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Includes:
•
Heart
•
Blood
•
Veins
•
Capillaries
•
Arteries
•
Is an
organ
•
A
Pump
•
4
chambers
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Made of mostly
cardiac muscle
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~ the size of your fist
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almost in the
center of your
chest.
Heart Chambers
Right Atrium
Left Atrium
Right Ventricle
Left Ventricle
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Oxygen-poor blood from
the body comes into the
right atrium
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Passes through the
tricuspid valve to the right
ventricle
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Passes to the pulmonary
arteries and onto the
lungs.
What do you think the valves are for?
•
Oxygen-rich blood
comes in from the
lungs to the left atrium
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Passes to the left
ventricle through the
bicuspid valve
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Passes out to the
body through the
aorta.
Arteries
Arterioles
capillaries
venules
veins
A for Away
Arteries take blood
away
from the heart.
Thick
elastic walls lined with smooth
muscles.
Heartbeat pumps blood at a
high
pressure
›
Called
Blood Pressure
›
Stretch to withstand this pressure
Called pulse
Ventricles and Arteries: Pumping Blood from your Heart
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Left Ventricle
Right Ventricle
Artery
Artery
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Exchange site between
body
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Ex.
nutrients, O
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Very thin=cells travel through in
single
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Return blood
to
the heart.
Need
valves
to keep blood flowing in
one direction.
Atriums and Veins: How Blood gets into your Heart
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Right Atrium
Left Atrium
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Veins
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Pulmonary Circulation
›
Circulation between heart and lungs
Systemic Circulation
›
Circulation between heart and body
Atherosclerosis
›
When cholesterol builds
up in blood vessels
High Blood Pressure
(hypertension)
›
Abnormally high blood
pressure
Stroke
›
When a blood vessel in
the brain becomes
clogged or ruptures
Heart Attack
›
When heart muscles cells
die
Heart Failure
›
When heart cannot pump
enough blood to the
body
Structure of Your Heart: Summary
Right
Atrium
Left
Atrium
Right
Ventricle
Left
Ventricle
From
Lungs
To
Lungs
From
Body
To
Body
Blood from Veins into Heart
Blood to Arteries out of Heart
Tricuspid
Bicuspid
Heart Structure
1.
Aorta
2.
Superior Vena Cava
3.
Pulmonary Artery
4.
Pulmonary Vein
5.
Right Atrium
6.
Tricuspid
7.
Right Ventricle
8.
Inferior Vena Cava
9.
Pulmonary Artery
10.
Pulmonary Vein
11.
Left Atrium
12.
Bicuspid
13.
Aortic Semilunar Valve
14.
Left Ventricle
15.
Descending Aorta
******Parts to ADD
16. Septum
17. Pulmonary Semilunar valve
18. Myocardium
16.
17.
18.
The cardiovascular system, comprised of the heart, blood vessels, and blood, plays a vital role in circulating nutrients, oxygen, and waste throughout the body. This summary provides insights into the structure and function of the heart's chambers, blood flow through the circulatory system, and the importance of arteries, veins, and capillaries in maintaining circulation.
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Presentation Transcript
Cardiovascular System Chapter 2.1
Circulatory System Carries blood throughout the body Includes: Heart Blood Veins Capillaries Arteries
The Heart Is an organ A Pump 4 chambers Made of mostly cardiac muscle ~ the size of your fist almost in the center of your chest.
Heart Chambers The Atriums are the upper chambers They send blood to the ventricles Left Atrium Right Atrium Right Ventricle Left Ventricle The Ventricles (work horse) are the lower chambers Send blood out of the heart
Right side of the Heart Oxygen-poor blood from the body comes into the right atrium Passes through the tricuspid valve to the right ventricle Passes to the pulmonary arteries and onto the lungs. What do you think the valves are for?
Left side of the Heart Oxygen-rich blood comes in from the lungs to the left atrium Passes to the left ventricle through the bicuspid valve Passes out to the body through the aorta.
Blood vessels Arteries Arterioles capillaries venules veins
Arteries A for Away Arteries take blood away from the heart. Thick elastic walls lined with smooth muscles. Heartbeat pumps blood at a high pressure Called Blood Pressure Stretch to withstand this pressure Called pulse
Ventricles and Arteries: Pumping Blood from your Heart Blood leaves the Heart through two ARTERIES. Artery Artery Right Ventricle Left Ventricle The Heart pumps blood through Arteries to the Lungs to collect Oxygen. The Heart pumps blood through Arteries to supply Oxygen to the Body.
Capillaries Exchange site between body and blood. Ex. nutrients, O2, CO2, and waste Very thin=cells travel through in single file.
Veins Return blood to the heart. Need valves to keep blood flowing in one direction.
Atriums and Veins: How Blood gets into your Heart Blood enters the Heart through two VEINS. Veins Left Atrium Right Atrium The Lungs send blood with Oxygen in it through veins to the Heart. The Body sends blood with no Oxygen in it through veins to the Heart.
Two types of Circulation Pulmonary Circulation Circulation between heart and lungs Systemic Circulation Circulation between heart and body
Cardiovascular Problems Atherosclerosis When cholesterol builds up in blood vessels High Blood Pressure (hypertension) Abnormally high blood pressure Stroke When a blood vessel in the brain becomes clogged or ruptures Heart Attack When heart muscles cells die Heart Failure When heart cannot pump enough blood to the body
Structure of Your Heart: Summary Blood from Veins into Heart From Lungs From Body Right Atrium Left Atrium Tricuspid Bicuspid Right Ventricle Left Ventricle To To Body Lungs Blood to Arteries out of Heart
Heart Structure ******Parts to ADD 16. Septum 17. Pulmonary Semilunar valve 18. Myocardium 1. Aorta 2. Superior Vena Cava 3. Pulmonary Artery 4. Pulmonary Vein 5. Right Atrium 6. Tricuspid 7. Right Ventricle 8. Inferior Vena Cava 9. Pulmonary Artery 10. Pulmonary Vein 11. Left Atrium 17. 12. Bicuspid 13. Aortic Semilunar Valve 14. Left Ventricle 16. 18. 15. Descending Aorta
