Male Genitourinary System Flashcards
the Penis system
penis is composed of three cylindrical columns of erectile tissue:
two corpora cavernosa on the dorsal side and the
corpus spongiosum ventrally
scrotum
loose protective sac that is a continuation of the abdominal wall
scrotal wall
consists of thin skin lying in folds, or rugae,
cremaster and dartos muscles
control the size of the scrotum by responding to ambient temperature.
This is to keep the testes at the best temperature for producing sperm: 3°C below abdominal temperature.
dartos muscle
also contracts, causing the scrotal skin to wrinkle.
When it is warmer, these muscles relax, the scrotum lowers, and the skin looks smoother.
lymphatic vessels
scrotal surface drain into the inguinal lymph nodes, whereas those of the testes drain into the abdomen.
Abdominal lymph nodes are not accessible to clinical examination.
Developmental Considerations
During gestation, the testes develop in the abdominal cavity near the kidneys.
During the later months of gestation, the testes migrate, pushing the abdominal wall in front of them and dragging the vas deferens, the blood vessels, and nerves behind.
The testes descend along the inguinal canal into the scrotum before birth.
stage one of developmental
pubic hair; No pubic hair; fine body hair on abdomen
penis; size and proportion are the same as during childhood
stage two of developmental
pubic hair; Few straight, slightly darker hairs at base of penis are long and downy
penis; Little or no enlargement
scrotum; Enlargement of testes and scrotum; scrotal skin reddens and changes in texture
stage three
pubic hair Sparse growth over entire pubis; hair is darker, coarser, and curly
penis Enlargement
scrotum; Further enlargement
stage four
pubic hair Thick growth over pubic area but not on thighs; hair coarse and curly
penis Continued enlargement in length and diameter, with development of glans
scrotum Testes almost fully grown;
stage five
pubic hair Growth spread over medial thighs, although not yet up toward umbilicus; after puberty, pubic hair growth continues until the mid-20
penis Adult size and shape
scrotum Adult size and shape
Circumcision
elective surgical procedure to remove all or part of the foreskin (prepuce) from the penis, usually performed on newborn males.
subjective data
- Frequency, urgency, and nocturia
- Dysuria
- Hesitancy and straining
- Urine colour
- Past genitourinary history
- Penis: pain, lesion, discharge
- Scrotum: self-care behaviours, lump
- Sexual activity and contraceptive use
- STI contact
- STI risk reduction