Scrotum + Spermatic Cord + Temperature Regulation

Scrotum

• what type of structure is it to the RS?

• what is it homologous to?

supporting structure 

homologous to the labia majora

Scrotum:

• function

enclosed and supports the testes

(S) Raphe

• what is it?

external medial ridge 

“scar” left over from the remain of the scrotum coming together 

Scrotal septum

• function

• what is it made up of?

divides the scrotum into two compartments each containing a testis 

dartos muscle

(S) Dartos muscle

• what does it make 

• what type of muscle?

makes the scrotal septum 

smooth muscle fibers 

Spermatic cord

• what type of structure is it to the RS?

• what does it consist of?

supporting structure 

ductus deferens, testicular artery, veins, lymphatic vessels, and cremaster muscle 

(SC) Inguinal canal

passage in anterior abdominal wall on each side of the body 

How is temperature regulated?

location of the scrotum and contraction of muscle fibers regulate the temperature of the testes 

Sperm Production?

• how many per day?

• what type of process is it?

  • what happens if it is not?

400,000 

temperature sensitive, testes require 3 Celsius below body temperature 

• if not sperm is not viable  

(SP) What happens during cold weather

dartos and cremaster muscles contract

• dartos: tightens the scrotum 

• cremaster: moves the testes closer to the body 

(SP) What happens during hot weather?

dartos and cremaster muscle relax

The dartos and cremaster muscles also contract during?

sexual arousal