Prerequisite Knowledge

Students should have knowledge of:

• Blood • Blood vessels• Double circulation• The location of the heart• The basic functions of the heart• The basic functions of the atria and ventricles

Specific Instructional Objectives:

Students should be able to:

• identify and describe the function of the septum

• explain the difference in structure between the left and right ventricles

•explain the difference in structure between the atria and ventricle walls

(Students provided with slides so they can fill in answers)

Septum

Septum

What do you think is the function of the septum?

A cup of water separated into 2 coloured parts by a waterproof card.

Deoxygenated Blood

OxygenatedBlood

Why do you think the separation of deoxygenated and oxygenated blood is important?

What happens if the septum is broken or removed?

Hole in the heart or septal defecthttp://www.webmd.com/video/helex-heart-patch

Septum

Septum

RIGHT LEFT

Septum

A cup of water separated into 2 coloured parts by a waterproof card.

LORD of the reverse (DROL)

eftight LO

RD xygenatedeoxygenated

We, the citizens of Singapore,pledge ourselves as one united people,regardless of race, language or religion,to build a democratic societybased on justice and equalityso as to achieve happiness, prosperity andprogress for our nation.

How do we identify the side of the heart that contains oxygenated blood?

The side with a thicker muscular wall.

Does that mean that the whole half of the heart will be thicker than the other?

There is NO difference in thickness between the left and right atria.

Septum

What is the function of the septum?

What happens if the septum is broken or removed?

In the heart, is the thickness of the muscular walls uniform? Why?

Recap!

Next lesson:

Learn about the rest of the structure of the heart

Atria and ventricle involvement in the muscular contractions of the heart (Homework: Read up)