Transcript Circulatory System

Circulatory System
PART ONE
Red blood
cells
White
blood cells
Platelet
#1
The 4 Components of Blood
Red Blood Cells
- Cells that carry oxygen molecules
- They contain hemoglobin
- Does not have a nucleus
- 120 day lifespan
White Blood
Cells
- Immune cells that attack and engulf pathogens
- Uses the circulatory system for transportation to sites of injury
Platelets
- Cellular elements that initiate the blood clotting process
- They clump together to create a “plug” to prevent further blood
loss
Plasma
- A pale-yellow liquid
- The majority of the liquid is water, the rest is: proteins, glucose,
minerals, CO2 and hormones
#2
Purpose & Function of the
Circulatory System
1.
To transport oxygen and nutrients to the body’s
cells.
2.
To transport carbon dioxide and wastes away from
the body’s cells.
3.
To provide a transportation system for our immune
system cells.
4.
To distribute heat throughout the body.
#3
Blood Vessels
Artery
Vein
Capillary
#3
Blood Vessels
Artery
Capillary
Vein
Function
Carries blood away
from the heart at
high pressure
Site of gas and
nutrient diffusion
Returns blood to
the heart at low
pressure
Structure of Wall
Thick, muscular,
elastic wall
Thinnest walls, one
cell thick
Thin wall, less
muscular
Size of Opening
Valve?
How does structure
meet it’s function?
Narrow
Very Narrow
Wide
No
No
Yes
Strength and
elasticity needed to
withstand the
pulsing of the blood,
prevents bursting
No need for strong
walls, as most of
the blood pressure
has been lost, thin
walls allow for
diffusion of
materials between
the vessel and body
cells
No need for strong
walls, as most of
the blood pressure
has been lost,
valves prevents
backflow of blood
Valves in Veins
Prevents Backflow of Blood
#4
Aorta
Pulmonary Artery
Left Atrium
Superior
Vena Cava
Pulmonary
Veins
Right Atrium
Inferior
Vena Cava
Mitral Valve
Aortic Valve
Tricuspid Valve
Pulmonary Valve
Right Ventricle
Left
Ventricle
Aorta
Pulmonary Artery
Superior
Vena Cava
Pulmonary
Veins
Right Atrium
Left Atrium
Inferior
Vena Cava
Mitral Valve
Tricuspid Valve
Aortic Valve
Pulmonary Valve
Right Ventricle
http://www.youtube.com/watch?v=-s5iCoCaofc
Left
Ventricle
#5
Arteries
Veins
Right
Lung
Left
Lung