What do the colors on the flag of Norway mean? Credit: Thinkstock Images Stockbyte Getty Images. The Union Jack is composed of the flags of three patron saints layered one over the other. The central red cross on a white field is the flag of St. George, the patron saint of England.
Synaptic vesicles contain thousands of neurotransmitter. The  neurotransmitters are packed into a small membrane bound synaptic  vesicles. There are thousands of neurotransm â¦ itter molecules.
The seminal vesicles are convoluted pouch-like structures lying posterior to the base of the urinary bladder, in front of the rectum. They secrete an alkaline viscous fluid co â¦ ntaining fructose, prostaglandins and fibrinogen that make up about 60% of the fluid volume of semen.he seminal vesicleis a male-specific structure which is about 2 inches or 5 centimeters long and is located behind the urinary bladder and above the prostate gland.