S

• Parts of speech


  • Noun - Common, Proper, Hostract, Concrete, Possessive, Singular Plural
  • Verbs - Action, Mental, linking helping (reqwach, Presently! Past, Future
  • Pronouns - Personal, Interrogative, Demonstrative, Possessive, Indefinite
  • Adjectives - Proper, Common, himling, Descriptive, Demonstrative, Possessive, Interrogative, Miticles
  • Conjunctions - Subdinating
• Subjects and Predicates


  • Simple
  • Compound
  • Complete
• Types of sentences


  • Declarative
  • Imperative
  • Inderogating
  • Exclamatory
• Male reproductive system


  Produces and supplies sperm
• External anatomy


  • Penis
  • Scrotum
• Testes


  Site of sperm production
• Sperm production in testes


  1. Seminiferous tubules

  2. Leydig cells produce testosterone

  3. Sertoli cells produce androgen binding protein

  4. Androgen binding protein binds to testosterone to promote sperm production
• Pituitary gland


  Releases gonadotropins (luteinizing hormone and follicle stimulating hormone) that stimulate Leydig and Sertoli cells
• Sperm transport


  1. Epididymis stores and matures sperm

  2. Vas deferens transports sperm
• Seminal vesicles


  Produce two-thirds of the volume of semen, including fructose as an energy source for sperm
• Ejaculation


  1. Seminal fluid from seminal vesicles mixes with sperm from vas deferens

  2. Enters ejaculatory duct

  3. Passes through prostate

  4. Travels through urethra in penis
• Penis


  • Made of spongy tissue
  • Erection occurs via parasympathetic nervous system
  • Ejaculation occurs via sympathetic nervous system
• Prostate can grow and impede urethra, causing difficulty urinating (prostatic hyperplasia)