Transcript Lesson 3 Ciruculatory and Excretory

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
Hook: Interesting Facts

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
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


Veins carry blood to the heart


Have thick muscular walls (for contraction)
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 (head,
forelimb)
Right side of heart
Abdominal
Organs (Spleen,
Stomach, liver)
Capillaries ( lungs)
Left side of heart
Capillaries (hind
limbs)
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
Homework
 Read
pages 100-103
 Answer
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:
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

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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