7.1 Anatomy of the Urinary System Part 4 Flashcards
What is the mucosal lining of the urethra made of?
starts as transitional epithelium as it exists the bladder and transitions to stratified columnar and then stratified squamous
What type of control is the internal urethral sphincter under?
involuntary
Where is the internal urethral sphincter located?
near the bladder
What is the function of the internal urethral sphincter?
keeps the urethra closed to prevent urine from leaving the bladder
What type of control is the external urethral sphincter under?
voluntary
What is the external urethral sphincter comosed of?
skeletal muscle
What are the main differences between the urethra in males and females
females is 5 times shorter
males carries both urine and semen
Who is more at risk for bacterial infection in the urethra?
females
What is a UTI?
urinary tract infection
What are three regions of the male urethra?
prostatic urethra
membranous urethra
spongy urethra
Where is the prostatic urethra located?
runs through the prostate gland
Where is the membranous urethra located?
runs within the urogenital diaphragm
Where is the spongy urethra located?
runs within the penis
What is the basic structural and funtional unit of the kidney?
nephron
How many nephrons are in each kidney?
about 1 million
