Testes

Looks like

An egg-shaped gland about 4 cm long hanging in the scrotum, kept a couple of degrees cooler than the body.

What it does

Makes sperm and testosterone.

Keeping it well

Know how they normally feel and get a new lump checked; sudden severe pain is a twist and needs surgery within hours.

Its parts

• Seminiferous tubules
• Leydig cells
• Sertoli cells
• Tunica vaginalis

Related conditions

• Adrenal insufficiency (Addison's)
• Bone metastases and spinal cord compression
• Early puberty (precocious puberty)
• Epididymitis and orchitis
• Hydrocele
• Hyperthyroidism & Graves' disease
• Hypothyroidism
• Klinefelter syndrome (XXY)
• Male hypogonadism
• Male infertility
• Menopause & perimenopause
• Mumps
• Polycystic ovary syndrome
• Postnatal depression
• Testicular cancer
• Testicular torsion
• Type 1 diabetes
• Undescended testis (cryptorchidism)
• Varicocele