Of Membranes & Red Blood Cells

Today my experiment of the day is to extract red blood cells(by pricking ourselves with a needle) and then immerse them into 3 different type of solutions(isotonic, hypertonic and hypotonic) and observe what will happen to the cells. =D

Overall it was quite fun seeing your blood projected on the big screen and helping friends to prick their fingers muahhahahahhaa. =X

The basket to dispose our stuff. =3

Step 1:

Prepare the needle.

Prepare the solutions.

A: Hypotonic

B: Isotonic

C: Hypertonic

Step 2: Sterilise your finger with alcohol swab.

Step 3: Prick your finger

Before

After

Step 4: Squeeze the blood out and drip it on to a slide

Picture taken by Mei Yi

Put a cover slide over the specimen.

More blood. XD

And more~~~

Step 5: Observe under microscope!

My blood is on the screen!

Even bigger screen~

RBC in hypotonic solution. Can see clearly the cells have haemolysed.

RBC in isotonic solution. All the cells nice nice. =D

RBC in hypertonic solution. All cells crenated. =D

That's all for now. =)