respiratory system
A pair of spongy air filled organs
what are lungs
The size of your fist
What is the heart
what tipes of blood cells are white
what are white blood cells
What receives and expels air for respiration alongside the mouth?
What are nostrils or nares.
what need to in tain the life of the body's tissues
what blood vessels
what has blood teraveling through the body
what are the veins
chemical element with the symbol o
what is oxygen
what travels through the body
what is blood
what breahts in air and breaths out air?
what is a mouth
a windpipe which let you berth
what is trachea
something that has blood in side
what are veins
what system consisting of specific organs
what is the respiratory system
what are the muscular tubes
what are arteries