Download Anatomy-Cardiovascular System

AnatomyCardiovascular System
Characteristics &
Functions of the
Cardiovascular System
Anatomy-Cardiovascular System
Introduction
Grab a note taker
from the front
table
 NEW SEATS! 
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Anatomy-Cardiovascular System
Objectives

Students will be able to:
 Define terms relative to the cardiovascular
system.
 Describe the basic characteristics & functions
of the cardiovascular system.
Anatomy-Cardiovascular System
Terminology
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Cardio
 Heart
Vascular
 Vessels that
circulate blood
Oxygenated
 High oxygen level
Deoxygenated
 Low oxygen level
Anatomy-Cardiovascular System
Circulatory System
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Circulatory System
 Circulates blood
through the body
 Closed system
 Heart & blood
vessels
Anatomy-Cardiovascular System
Heart
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Chambered muscular
organ
Pumps blood
throughout the body
Receives
deoxygenated blood
through veins
Pumps oxygenated
blood through
arteries
The Lungs

Location:
On either side of the heart

Functions:
 Exchange
carbon
dioxide for oxygen
 Help to remove heat
from the body
The heart

Location:
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Under the sternum (slightly to the left) and between the lungs
Function:
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to pump blood throughout the body
Blood carries oxygen and nutrients to the cells
Blood carries carbon dioxide and waste products away from
the cells
The Heart
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Divided into 4 chambers
R and L atrium (upper chambers)
 R and L ventricles (lower chambers)
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Heart valves separate each chamber and prevent
a backflow of the blood
Tricuspid valve
 Biscuspid (mitral) valve
 Pulmonary valve
 Aortic valve
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Anatomy-Cardiovascular System
Heart
How does the blood flow through
the Heart?
Right Side of Heart
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Blood enters the heart through two
large veins, the inferior and superior
vena cava, emptying oxygen-poor
blood from the body into the right
atrium of the heart.
As the atrium contracts, blood flows
from your right atrium into your right
ventricle through the open tricuspid
valve.
When the ventricle is full, the tricuspid
valve shuts. This prevents blood from
flowing backward into the atria while
the ventricle contracts.
As the ventricle contracts, blood leaves
the heart through the pulmonic valve,
into the pulmonary artery and to the
lungs, where it is oxygenated and then
returns to the left atrium through the
pulmonary veins.
Left Side of Heart
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The pulmonary veins empty
oxygen-rich blood from the lungs
into the left atrium of the heart.
As the atrium contracts, blood
flows from your left atrium into
your left ventricle through the
open mitral valve.
When the ventricle is full, the
mitral valve shuts. This prevents
blood from flowing backward into
the atrium while the ventricle
contracts.
As the ventricle contracts, blood
leaves the heart through the aortic
valve, into the aorta and to the
body.
http://www.webmd.com/heart-disease/guide/how-heart-works?page=3
How blood flows through the
lungs
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Once blood travels through the pulmonic valve, it enters
your lungs. This is called the pulmonary circulation. From
your pulmonic valve, blood travels to the pulmonary
artery to tiny capillary vessels in the lungs.
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Here, oxygen travels from the tiny air sacs in the lungs,
through the walls of the capillaries, into the blood. At the
same time, carbon dioxide, a waste product of
metabolism, passes from the blood into the air sacs.
Carbon dioxide leaves the body when you exhale. Once
the blood is purified and oxygenated, it travels back to the
left atrium through the pulmonary veins.
Anatomy-Cardiovascular System
Blood Flow
Anatomy-Cardiovascular System
Blood Vessels

Arteries
Veins
Blood vessels
 Elastic tubes
 Carry blood
 Arteries
 Arterioles
 Capillaries
 Venules
 Veins
Anatomy-Cardiovascular System
Arteries
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Arteries
 Muscular, thick,
elastic blood vessels
 Carry oxygenated
blood away from the
heart to body cells,
tissue & organs
 Except for pulmonary
artery
artery
Anatomy-Cardiovascular System
Arterioles
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Arterioles
 Small terminal
branches of arteries
 Connect arteries to
capillaries
arteriole
artery
Anatomy-Cardiovascular System
Capillaries
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Capillaries
 Very small blood
vessels
 Connect arterioles
to venules
arteriole
artery
capillary
Anatomy-Cardiovascular System
Venules
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Venules
 Small veins
 Connect capillaries
to larger veins
arteriole venule
artery
capillary
Anatomy-Cardiovascular System
Veins
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Veins
 Thin walled blood
vessels
 Carry
deoxygenated
blood to the heart
from body cells,
tissue & organs
 Except for
pulmonary vein
arteriole venule
artery
capillary
vein
Anatomy-Cardiovascular System
Write 3 Things You Learned
Direction blood pumps through
the heart