dissabte, 11 de febrer del 2012

Blood cells in blood vessels

AMAZING!!!!  This is a blood vessel (remember: un vas sanguini) with all the components, and they have a different function : to protect, to transport or to coagulate.  This is called<. SPECIALIZATION OF CELLS.
Plasma is a liquid too, yellow colour. It’s 90% water and the rest of it is  proteins …


Here you are some red blood cells. They have a very  important function: to transport oxygen to the body. You can see on white blood cell also called: leukocyte.  How cute, isn’t it??It’s like a snowball. It protects you from infections, bacterias, virus...
You see......................... A perfect machine, our circulatory system.


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