2007-02-19 21:21:47 · 3 answers · asked by sugar b 2 in Science & Mathematics ➔ Biology
i don't know maybe oxygen and food to live
white blood cells and antibodies for defense against for-in invaders
2007-02-19 21:24:29 · answer #1 · answered by twocenst 3 · 0⤊ 0⤋
Because of its reach to all areas of the body to deliver oxygen, the circulatory system is also used by white blood cells as a highway to get to damaged tissue and infection sites. When they reach the sites, they simply push through the wall of the blood vessels to do their work. Also any antibodies produced can be distributed to the entire body very quickly.
2007-02-19 22:27:13 · answer #2 · answered by Labsci 7 · 0⤊ 0⤋
It serves as a Circulatory system but because of presence of antibodies and WBC it can be counted as defence system also.
Read this:
http://www.daviddarling.info/encyclopedia/C/circulatory_system.html
2007-02-19 21:28:56 · answer #3 · answered by Vimal M 2 · 0⤊ 0⤋