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Hook: Interesting Facts Science There are 97,000km of blood vessels in every human
The aorta, which is largest artery located in the body, is about the diameter of a garden hose
The risk of cardiovascular disease is twice as high in women that snore regularly compared to women who do not snore
The right lung of a human is larger than the left one. This is because of the space and placement of the heart
The average life span of a single red blood cell is 120 days
Canadians eat more Kraft Dinner (Macaroni and Cheese) per capita than any other country in the world
Most lipstick contains fish scales
China has more English speakers than the United States
Vending machines kill more people each year than sharks do
Approximately 75% of human poop is made of water
Hook: Interesting Facts
Agenda Hook: Fun Facts
Overview of the circulatory system: Arteries, veins, & capillaries
The human heart Labelling
The human heart Blood Flow
What Am I - Activity
Circulatory system labelling
Circulatory system related problems
Circulatory system in other organisms
The Circulatory System
Is composed of three main parts: Heart, blood vessels, and blood.
There are three types of blood vessels: Arteries, Veins, and Capillaries.
A closed system
Function To transport blood,
nutrients, waste, and gases (oxygen and carbon dioxide)
Arteries, Veins, & Capillaries Arteries carry blood away from the heart
Have thick muscular walls (for contraction)
Veins carry blood to the heart Thin walls
Capillaries bring blood into close contact with tissues in the body (E.g. muscle tissue) Very thin in diameter
Blood Movement in the Heart
Deoxygenated blood from the body’s veins enters the right atrium of the heart.
It is then passes a valve and moves into the right ventricle.
From the right ventricle it is pumped to the lungs to receive oxygen and lose carbon dioxide
Blood Movement in the Heart The oxygen rich blood then
flows into the left atrium.
Passing another valve it moves into the left ventricle.
The blood is then pumped to the rest of the body through the aorta and into the arteries.
Oxygen is carried throughout the body.
Circulatory System
Capillaries ( lungs)
Capillaries (head, forelimb)
Left side of heart
Right side of heart
Capillaries (hind limbs)
Abdominal Organs (Spleen, Stomach,
liver)
Review: Blood Flow throughout the Body
Deoxygenated blood from the body enters the right atrium
The deoxygenated blood will then flow from the right ventricle to the lungs
The lungs will exchange the carbon dioxide in the blood for oxygen
The oxygenated blood then enters the left atrium and exits the left ventricle
It then provides oxygen to tissues around the body
Heart Attack If too much cholesterol
is ingested than plaque may build up
When excessive plaque builds up the artery may be clogged.
If the artery is clogged then little oxygen will move to the heart = Heart attack.
If lack of oxygen moves to the brain = Stroke
Circulatory System in Other Organisms Insects have open circulatory
systems
Fish have 2 chambered hearts (1 atrium and 1 ventricle)
Amphibians have 3 chambered hearts (2 atria and 1 ventricle). Some of the oxygenated blood
and deoxygenated blood is mixed.
Some does not pass through the lungs
Activity 3-3: Changing Your Pulse Rate (p. 101)
Bring in a timer (phone may be permitted only for use as a timer)
Select a partner
Collect data
Record data in chart format (for each partner)
Answer questions
Only one paper will be submitted for each pair
What am I? Heart Blood Flow Exercise Each pair of students will receive a paper with
a region of the heart written on it.Task To describe your region of the heart without
giving away its name: One individual will be responsible for illustrating
the region of the heart The other will be responsible for describing the
region of the heart The class will then have to guess which region of
the heart it is
Follow up Activity: Blood Flow Order
Have one student from each pair come to the front and organize in order according to blood flow. Teacher will begin by organizing the
superior and inferior vena cava. The students will organize the rest