Transcript Cardiovascular System (Circulatory System)

Cardiovascular
System
Health
Cardiovascular System
Why is it called a transport system?
1. Transportation of fuel
-carries food and oxygen to cells
2. Transportation of wastes
-carries waste back to liver & kidneys
3. Transportation of disease fighters
-carries cells that fight disease
4. Transportation of hormones
- carries hormones throughout the body
Cardiovascular System
What is included in the Cardiovascular
System?
HEART
BLOOD VESSELS
Arteries,Veins,Capillaries
BLOOD
LUNGS
Cardiovascular System
Heart
- muscle that drives your circulatory
system
- size of your fist
- Beats about 60-80 times a minute
(resting heart rate)
Cardiovascular System
Chambers of the Heart:
Right Atrium
Right Ventricle
Left Atrium
Left Ventricle
Cardiovascular System
Flow of blood through the heart:
 From the body
 Right Atrium-–un-oxygenated blood
 Right Ventricle
 Pulmonary Artery
 Lungs
 Left Atrium- oxygenated blood
 Left Ventricle
 Aorta -Body
Cardiovascular System
Blood Vessels
Arteries – largest blood vessels that take
oxygenated blood(bright red) away from the
heart.
 Has 3 layers, thick elastic walls
 The largest is the aorta.
Cardiovascular System
Veins – Carries oxygen-poor (dark red)blood
back to the heart from body cells
• Has 3 layers
• Thin, only slightly elastic
• Has one way valves that help blood flow in
one direction
• Muscles of the body help to squeeze the
veins and move the blood back to the heart
Capillaries
Thinnest blood vessels
 In capillaries:

◦ Oxygen leaves blood to enter
body cells
◦ Carbon dioxide leaves body
cells to enter blood
Cardiovascular System
Blood
4 Parts of your blood:
Plasma - Liquid
2. Red blood cells – Oxygen carrier
3. White blood cells – Disease fighters
4. Platelets – Helps blood clot, or
thicken
1.
Cardiovascular System
Common problems:
High Blood Pressure – to much force on
the walls of the blood vessels
Anemia – person who does not have
enough red blood cells
Hemophilia – disease where the blood
clots little or not at all
Arteriosclerosis – hardening of the
arteries
Calculating Heart Rate

Resting Heart Rate (RHR)
◦ Keep track of your pulse for 15 seconds
◦ Multiply the beats of your pulse by 4
◦ EX: 23 X 4 = 92 Beats/Min

Max HR
◦ 220 – Age
◦ EX: 220 – 11 = 209 Beats/Min

Target Heart Rate (THR)
◦ 60 – 85% of Max HR
◦ EX: 209 X (.6) – 209 X (.85) = (126 – 178) Beats/Min
Cardiovascular System-Taking Your
Pulse
You can check your
pulse wherever there
is an artery running
under your skin
 Each beat is caused by
a contraction
(squeezing) of the
heart
