Transcript The Circulatory System

The Circulatory System
Presentation given
by:
– Ginger Drain
– Nancy Duggan
– Marcus Edwards
1
The Circulatory System is responsible for transporting
materials throughout the entire body. It transports nutrients,
water, and oxygen to your billions of body cells and carries
away wastes such as carbon dioxide that body cells produce.
o
The Blood
o
The Vessels
o
The Heart
Blood
What gets your blood moving?
Your blood has traveled many a mile.
Your blood is carrying quite a load.
How much blood do YOU have?
What is your blood composed of?
The beat of your heart
Oxygen-poor blood (blue) flows
from the body into the right
atrium
Blood flows through the right
atrium into the right ventricle
The right ventricle pumps the
blood to the lungs, where the
blood releases waste gases and
picks up oxygen
The newly oxygen-rich blood (red)
returns to the heart and enters
the left atrium
Blood flows through the left
atrium into the left ventricle
The left ventricle pumps the
oxygen-rich blood to all parts of
the body
Vessels: well traveled
Arteries
Veins
How Much do YOU have ?

Young People

Adults
Components

Red Blood Cells

White Blood Cells

Platelets

Plasma
Red Blood Cells
Responsible for
carrying oxygen and
carbon dioxide
Carry oxygen to cells
Transport carbon
dioxide back to lungs
How many are in one
drop of blood?
White Blood Cells
Help the body fight
off germs
Attack and destroy
germs when they
enter the body
How many are in one
drop of blood?
Platelets
Blood cells that help
stop bleeding
Sticky
Stick to opening in
vessels and attract
other fibers and blood
cells to help form the
plug
Another name for a
platelet plug….
Plasma
Liquid part of the blood
 Half of your blood
 Carries other components throughout the
body
 Made in liver

Tubular Circulation
A vessel is defined as
a hollow utensil for
carrying something:
a cup, a bucket, a
tube.
 Located throughout
your body, your blood
vessels are hollow
tubes that circulate
your blood.

Types of Blood Vessels

Arteries – carry blood
away from the heart.

Veins – carry blood to
the heart.

Capillaries – connect
the arteries to veins.
Blood Vessels

Child = 60,000 miles
long.

Adult = 100,000 miles
long.
Health Statistics

Besides circulating blood, the blood vessels
provide two important means of measuring vital
health statistics: pulse and blood pressure.
Blood Pressure

When we measure blood pressure, we use the
blood flowing through the arteries because it
has a higher pressure than the blood in the
veins.
Blood Pressure

The first number, which is higher, is taken
when the heat beats during the systole
phase.

The second number, is taken when the
heart relaxes during the diastole phase.
Blood Pressure

Systole Phase –
normal blood
pressure range is
110-150 millimeters.

Diastole phase –
normal blood
pressure ranges over
60-80 millimeters.
The Heart
Structures and Functions
Basic Structure
Functions
Right-Hand Side of the Heart
The right-hand side of the heart
receives de-oxygenated blood from the
body tissues (from the upper- and
lower-body via the Superior Vena Cava
and the Inferior Vena Cava,
respectively) into the right atrium. This
de-oxygenated blood passes through
the tricuspid valve into the right
ventricle. This blood is then pumped
under higher pressure from the right
ventricle to the lungs via the pulmonary
artery
Functions
Left-Hand Side of the Heart
The left-hand side of the heart
receives oxygenated blood from the
lungs (via the pulmonary veins) into
the left atrium. This oxygenated
blood then passes through the
bicuspid valve into the left ventricle.
It is then pumped to the aorta under
greater pressure (as explained
below). This higher pressure
ensures that the oxygenated blood
leaving the heart via the aorta is
effectively delivered to other parts of
the body via the vascular system of
blood vessels (incl. arteries,
arterioles, and capillaries).
Cardiac Conduction System
Electrical System
LUB-DUB
Interesting Heart Facts
AgePulse
What causes the sound your heart makes?
When someone listens to your heart with a stethoscope the
sound is often described as - lub-dub lub-dub. The 1st heart
sound (lub) is caused by the acceleration and deceleration of
blood and vibration of the heart at the time of the closure of the
Tricuspid and Mitral Valves. The 2nd heart sound (dub) is
caused by the same acceleration and deceleration of blood and
vibrations at the time of closure of the Pulmonic and Aortic
Valves.
Newborn
How many times does you heart beat?
The average heartbeat is 72 times per minute. In the course of
one day it beats over 100,000 times. In one year the heart beats
almost 38 million times, and by the time you are 70 years old, on
average, it beats 2.5 billion times!
120
Does your heart rate change as we age?
Everyone's pulse (average heart rate per minute) changes as we
age. Here is a chart of average pulse at different ages:
How much blood does your heart pump?
An average heart pumps 2.4 ounces (70 milliliters) per heartbeat.
An average heartbeat is 72 beats per minute. Therefore an
average heart pumps 1.3 gallons (5 Liters) per minute. In other
words it pumps 1,900 gallons (7,200 Liters) per day, almost
700,000 gallons (2,628,000 Liters) per year, or 48 million gallons
(184,086,000 liters) by the time someone is 70 years old. That's
not bad for a 10 ounce pump!
130
3 months
140
6 months
130
1 year
2 years
115
3 years
100
4 years
100
6 years
100
8 years
90
12 years
85
adult
60 - 100