WILD 3580 1st Edition Lecture 37Outline of Last Lecture I. Skin GlandsII. Hair Outline of Current Lecture I. HairII. ColorIII. Respiratory System IV. Circulatory SystemV. Reproduction Current LectureI. Hair1. Guard hairs2. Underfur- short, dense hairs that underline the guard hairs for insulation3. Vibrissae- “whiskers”a. Associated nerves b. Tactile functionII. Color 1. Skin color2. Pelage color - 2 basic pigments1. Eumelanin- brown and black; gray is a diluted eumelanin 2. Pheomelanin- reddish or yellowish colors - Agouti pattern- alternating bands of different pigments o Color patterns are genetically controlled - Albinism and Melanismo Albinism- lack of any pigmentation Albinistic: less pigmentation than normal o Melanism- greater than normal level of eumelaninThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.III. Respiratory System a. Branched lungs that end with alveoli (site of gas exchange); air sacs b. Thin membranes c. Hierarchical branching system= surface to area ratiod. Muscular diaphragm- contraction (negative-pressure ventilation)IV. Circulatory System a. Complete 4 chambered heart i. Left aortic arch- whereas birds have a right aortic archb. Heart ratei. Negative function with body sizeii. As body size increases, heart rate decreases V. Reproduction a. Both ovaries are functional b. Internal fertilizationi. Occurs in the oviducts zygote developsii. Placenta: connection between the embryo and uterine wall - Exchange of nutrients, gases, and wastes c. Baculum- penis bonesi. All carnivores, most rodents, bats, some primates and
View Full Document
Unlocking...