<span>In the duct system the atop testis where sperm mature from is known as the epididymis</span>
C. a toy train is the item that has characteristics similar to a scientific model.
I don’t understand what u say
There are many forms of electromagnetic energy<span> including gamma rays, x rays, ultraviolet </span>radiation<span>, visible light, infrared </span>radiation<span>, microwaves and radio waves. </span>
Answer:
The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. The second line of defense is the immune system. Specialized immune cells coordinate and execute attacks to kill germs that make it past the body's physical barriers.
