Today we explored fetal circulation.  First we drew our conception of how fetal circulation might occur. Next we compared fetal and baby circulation in depth in the table below.  Finally we drew a schematic diagram to compare the two and listened to a baby cry because the newborn's first breath is when the ductus arterioles and the foramen ovale closes successfully

   

Blood slides. And submit multiple choice questions for our test and do a review

on the following topics
PATH OF BLOOD
HEARTBEAT
BLOOD PRESSURE
CONTROL OF BLOOD PRESSURE

submit your questions here

Human blood

chicken blood slide

Sickle cells

Muscle comparison

The Major Blood Vessels and Taking Blood Pressure

The Major Blood Vessels

OK so, during class,  we'll play doctor and find blood pressure.  Have  a look at this tutorial before you test this on each other...

Use Lego to model the path of blood

PATH OF BLOOD EXERCISE

We will use A HUGE map of the circulatory system to represents a subway with stations.  The stations are the lungs, heart, legs, head, intestines, liver, kidneys and all the arteries and veins that connect them.  We will model the passengers entering and leaving this subway today. 

Pieces of lego two kinds to be cars on the subway

Hemoglobin car

Plasma car

Pieces of lego to be the four kinds of passengers

Oxygen

Carbon dioxide

Waste

Nutrients 

Now everyone take a hemoglobin car and start at the lung, oxygen hops on at the lung.  Follow it to the heart aorta and lets go to legs where oxygen gets off and carbon dioxide hops on. 

Put a plasma car on and pick up carbon dioxide too.  Now travel back to heart then lungs, CO2 gets off and oxygen gets on…

Model the rest of the passengers going through the entire system.  Remember that

Oxygen and CO2 can ride on hemoglobin car and everyone but oxygen rides on the plasma car

Notes on Plasma and lymph

And Formed Elements

Continue working on the guided study

ECG and how it works

Your notes on ECG are here and an amazing summary sheet which explains it here

The conduction system of the heart:

The Heartbeat, the first sound you ever heard...

click on the video below to observe a beating heart

The next video gives a simple and  clear explanation of the chambers, valves and heart sounds

The Heart

The heart is an incredible muscle with properties that are in common with your skeletal muscles and nerves.  But it is a muscle like no other!  For one thing, it can continue to contract for an incredibly long time without resting.  Try asking your hand to do what your heart does and it probably wouldn't last 10 minutes, let alone sixteen years continuously.

This week, we will review notes on the heart with images and look at how a heartbeat works.  Further we will explore the control of heartbeat We will also listen to our own heart with a stethoscope and I'll teach you how to take blood pressure

Here is a review sheet