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Circulatory System
Transports nutrients, gases and
wastes
Types of Circulatory Systems
2) Invertebrates circulatory

A) No Circulatory System

B) Open Circulatory System
Vertebrates
 Closed Circulatory System
3) One celled animals (paramecium)
No circulatory system
 Takes in food and form a vacuole which
moves around inside

4) Simple organisms Ex. hydra
 No circulatory system
 takes in fluid with oxygen and food into
a single cavity (gut) and it then flows
around in its body

5) Larger organisms



Have more than one body opening.
Need a circulatory system to carry nutrients around
the body
A second opening to removes wastes
OUT
IN
6) Open circulatory system
When there is no separation between
blood and other fluids
 Ex. Arthropods – Like insects and
crabs that have an outer shell

7) Closed circulatory system
When blood is contained in vessels.
Large vessels bring blood to small
vessels and then returns.
 It is pumped by a heart (s)
 Ex. Earthworm and more complex
animals

8) Vertebrate circulation



Very complex
cardiovascular
system
composed of the
heart, blood vessels
and blood.
Occurs in all
vertebrates
9) Types of vertebrate Hearts



2 chamber: 1 atria, 1 ventricle ex. Fish
3 chamber: 1 atria, 2 ventricles
ex. Amphibians + reptiles
4 chamber: 2 atria, 2 ventricles
ex. Mammals + birds
Human Circulatory system
10) The 3 main parts of The
Circulatory system

The Heart

The Blood Vessels

Blood
Human heart
Heart – Parts

Atrium (atria) – Blood enters heart
- receiving chambers
- thin muscle walls

Ventricle (ventricles) –
- Blood pumps out to body
- Has Thick muscle walls

Valves – control blood flow
Heart sides
Right side – deoxygenated blood goes
to lungs
 Left side – oxygenated blood goes to
body


Septum – Separates the 2 sides of heart
Blood flow through heart
12) Types of Blood Vessels



Arteries
Veins
Capillaries
13) Arteries
-Carry Oxygenated blood away from Heart
-The Aorta is the largest artery to body
-Pulmonary arteries go to lungs
14) Veins
-Carry deoxygenated blood back to heart
- Low pressure blood
-Veins contain one way valves
-The Vena Cava is the largest vein to
heart
15) Capillaries

Tiny vessels where gasses and nutrients
exchanged with cells
16) Blood is made of two parts
Two Parts
 Plasma (Fluid) makes
up 55% of the blood
volume.
Blood Composition
60
50
40
30

Solids (Cells) make
up 45% of the blood
volume.
20
10
0
Plasma
Solids
17) Blood Plasma
97% Water
 3%
-Antibodies, Proteins
Nutrients and Wastes

18) Blood Cells
Red Blood Cells
-Carry oxygen
-Contain Hemoglobin
 White Blood Cells
-Attack bacteria & other invaders
 Platelets
-Control the blood clotting process

19) Blood Pressure
Systolic- Peak pressure
Diastolic- Minimum pressure
(resting)
Normal average adult
 Systolic = 120 mmHg
 Diastolic = 80 mmHg
Normal blood pressure?
Average adult
 120/80

Whats your average?
Heart Attack!!!
When Blood flow that feeds the heart is
blocked

DAMAGE

heart rap