It is inherited in an autosomal recessive manner and is caused by a mutation in the HBB gene. The mutation that causes hemoglobin E disease primarily occurs in Southeast Asian populations, and rarely in Chinese populations. Most people with HbE disease do not need any treatment.
CHAPTER 27 Homework Review ï· The ability of sperm cells to move along the ductus deferens is due to ________. peristaltic contractions ï· Prostate cancer is _______.sometimes a slow-growing cancer that may never represent a threat to the patient ï· Erection of the penis results from ________.a parasympathetic reflex ï· Why doesn't semen enter the ...
The epididymis and the vas deferens make up the duct system of the male reproductive organs. The vas deferens is a muscular tube that passes upward alongside the testicles and transports the sperm-containing fluid called semen.The epididymis is a set of coiled tubes that connects to the vas deferens.he epididymis and the vas deferens make up the duct system of the male reproductive organs. The vas deferens is a muscular tube that passes upward alongside the testicles and transports the sperm-containing fluid called semen.