Fill in the Blanks Male Reproductive SystemOnline version Using the fifteen words provided. Fill in the balcnks to make this explanation of the male reproductive system correct. Each will be used only once. by Chelsea Baker 1 erection semen scrotum sperm deferens Cowpers urine penis epididymis vas orgasm seminal vesicle testes nocturnal gland urethra emissions First , is produced in the small seminiferous tubules of the . These oval - shaped glands are protected by a sac called the . After the sperm cells are produced , they are stored in a large coiled tube on the outer surface of each testicle called the . From this tube , the sperm goes into a larger tube called , which eventually carries them to the external male reproductive organ , the . Along the way , sperm is nourished by a sugary fluid from the , a chemical fluid from the prostate which is the most common site of cancer in men , and fluid from the which are two small glands located near the bladder . These fluids plus the sperm cells combine to form , the fluid ejaculated from the penis during . Before a male can ejaculate the spongy tissue surrounding the penis becomes engorged with blood causing the penis to become stiff and hard . This is known as an . The tube that carries the semen from the body is the . This tube also carries from the bladder . Males can also have uncontrolled ejaculation during sleep , which is called .
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