
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

Lesson 3:
The Circulatory System


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
Capil laries.

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

Right side of heart
Abdominal
Organs (Spleen,
Stomach, liver)
Capillaries (hind limbs)
Capillaries (head, forelimb)
Capillaries ( lungs)
Left side of heart

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


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





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



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