BIL 160 Lecture Notes - Lecture 11: Estrous Cycle, Amniote, Gut Flora
28 Apr 2016
School
Department
Course
Professor
Document Summary
Reptila, birds, mammals, land dwelling animals contain a fancy aminiotic egg. Anapsids (turtle group), synapsia (mammaels, which branched off way earlier than birds), dyapsid (crocodilians and birds) Dyapid: no urinary bladder, instead they have a cloaca, incredible vision, vomeronasal organ. Have oil drops like birds: marsupial (kangaroo, wombat, koala) Teeth: diphydient: can"t replace, deciduous (baby teeth), then adult teeth, we are heterodonts compared to homodonts, human teeth pattern is 2:1:2:3, hypodonts= teeth grow continually (horses, cows, elephants) What makes us mammals: undercoat (insulation), guard (coarser, color, hair length is genetically determined, hair shed usually two to three times a year, vibrissae whiskers for touch, horns and antles. Horns are keratin around bone (rhino doesn"t have a true horn) Apocrine- milky substance, emotional, communication (happens in armpits and genitals) Sebaceous (oil) glands: keeps skin and hair soft. Browsers, grazers, gnawers: complex intestinal flora, cecum (junction of small and large intestine)
