Testicles produce sperm and testosterone for male development. Fertility begins between ages 11 and 17. Testicles grow 2-3 inches long and 1 inch wide during puberty
Testes are two egg-shaped organs located in scrotum. Each testicle surrounded by three membranes and suspended by spermatic cord. Adult testes measure 2-3 cm wide and 3-5 cm long
Inguinal canal is a passage in anterior abdominal wall on each side. Approximately 4-6 cm long, angled anteroinferiorly and medially. Located just above medial half of inguinal ligament. Deep inguinal ring is entrance, superficial ring is exit
Gonads are mixed glands producing gametes and sex hormones. Male gonads (testicles) produce sperm, female gonads (ovaries) produce eggs. Gonads evolved independently several times
Scrotum is a sac of skin containing testicles and spermatic cords. Located behind penis and above perineum. Divided into two cavities by connective tissue septum. Contains testicular artery, vein, and pampiniform plexus
Testicles are male gonads located in scrotum, extending from abdominal wall. Average adult testicle measures 5x2x3 cm, with normal volume 15-25 cm³. Testicles are covered by tunica albuginea and contain seminiferous tubules. Testicular temperature must be slightly below body temperature for optimal sperm production