CAS AN 263 Lecture Notes - Lecture 21: Lactiferous Duct, Myoepithelial Cell, Prolactin
Document Summary
This ability in human males to keep reproducing after their physical prime would have selected for longevity. Such selection would have been on autosomal genes - thus passed on to females as well. Skill-based tools such as spear very recent. Humans produce more than they consume - men in middle adulthood, women in late adulthood. Individuals with living parents have higher reproductive. Holding kin groups together and maintaining larger cooperative networks. Killer whales most like to follow post-reproductive females in food search, especially when food is low. Humans can keep making a contribution to fitness of their offspring and grandchildren after they"ve stopped reproducing. Lobules (inside lobe) contain alveoli - the site of milk synthesis. Alveoli open into milk-collecting ducts which form lactiferous ducts that drain each lobe. Lactiferous ducts converge on areola and form lactiferous sinuses that serve as milk reservoir. Each sinus open directly onto surface of nipple.
