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
Lesson 3: The Circulatory System
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
The Human Heart
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.
Summary: Blood Flow in the Heart
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
Blood Flow Summary
Method of Treatment: Angioplasty
Video on Angioplasty
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
HomeworkRead pages 100-103Answer questions #1-4 (page 107)
Read Activity 3-3 (p. 101)
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
Day 2
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
In Class Work/ Homework Complete in class worksheet Answer questions #5,6, & 8 (page
106) Due tomorrow
If time remains read ahead to the respiratory system