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