mammals resources 3 video clips marsupials rat dissection text chap 808-829
TRANSCRIPT
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MAMMALS RESOURCES 3 VIDEO CLIPS MARSUPIALS RAT DISSECTION TEXT Chap 808-829
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Class Mammalia kangaroo, bat, rodents, whales, monkey, giraffe, man, horse, dog
Incredible variety in size 1.5 g bat to 100 ton whale FEATURES young born live after
gestation in the female mammary glands (sweat,
oil, pheromone glands)
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lung breathing throughout life diaphragm separates abdominal
and thoracic cavities
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body covered with hair
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4 chambered heart
warm blooded
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7 neck vertebrae in most species
2 pairs of limbs for locomotion
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care for few young internal fertilization internal development
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ORDER MONOTREMATAAustralia, New Guinea, Tasmania ie. platypus, echidna most reptile like lay eggs echidna lays egg right into pouch don't control body temperature well cloaca no nipples but have mammary
glands
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Platypus
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echidna (spiny anteater) juvenile called “puggle”
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ORDER MARSUPALES
Australia, New Guinea, Tasmania ie. koala, kangaroo, opossum,
wombat 250 species pouched mammals Show Koala video here
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Koala Bear
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Tasmanian Devil
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Flying Phalangers
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Wombat
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opossum
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Kangaroo
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young born very helpless after a short gestation in the female
must crawl to the pouch nipples in the pouch
Assign reading and text questions (914-919)
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Why are they so isolated in Australia?
Continents separated 60 million years ago and left Australia with no placentals and only marsupials and monotremes.
marsupials were out competed by placentals else where in the world
DEFINE convergent evolution adaptive radiation
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PLACENTAL MAMMALS (draw the placenta)
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14 orders 95% of all mammals placenta- organ in the uterus that
connects mothers circulatory system to that of the baby
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ORDERS of interestUngulates
-some of the largest mammals Why? Need a large stomach to digest
coarse food (like the …….) (cellulose primary component in the diet) many are built for speed long light legs, flexible spine, missing
clavicle leg joints lack rotation, basically
pendulum movement
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CLASSIFICATION (based on feet, teeth and skulls)
2 Types Perrissodactyla- horse, rhino, tapir
(odd toed)
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the “Ungulates”Perissodactyla
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the “Ungulates”Perissodactyla
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Formerly the most successful order (How do we measure success?)
Number of species, # individuals, land area, number of habitats
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Artiodactyla - camel, antelope, hippo,
sheep, cow, pig, giraffe (even toed)
(currently the most successful)
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Order Artiodactylasuborder Suiformes
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Order Artiodactylasuborder Suiformes
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Digestion Bacteria in the gut aid in digestion,
produces enzymes necessary to break down cellulose (chemical digestion)
Repeated chewing of regurgitated veg. Matter continues mechanical digestion in some species
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Cows have a RUMEN = a chamber off the stomach for bacteria
Horse food flows through in 45 hours
Cow’s food flows through in 100 hrs
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More efficient at extracting nutrients from food may explain this group’s success!!!!
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PIGS (an even toed ungulate)
Terminology
Gilt- Sow- Boar- Barrow-
Virgin female
Female that has given birth
Male
Castrated male
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Farrow = giving birth Gestation 3 m 3w 3d Female puberty reached in 4-8
months, breed with in 1 year, heat 1-5 days, 2 ½ litters per year
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COWS ARE EVIL (notes in honor of Mr. Bangert)
-require half the world’s useable land area
-methane gas production “green house gas”
-poor source of nutrition (high fat, cancer agents, antibiotics)
-protein available from other sources -wasteful use of energy and water
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ORDER RODENTIA
RAT DISSECTION Rats, mice, porcupine, beaver Chisel like front teeth 40% of placental mammals relatively small, adaptive, high
reproductive rate, intelligent
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MARINE MAMMALS (several orders)
Pinnipedea- seals, sea lions, walrus, otters
Related to carnivores Predators Blubber Breed on land
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Seal (cat face) Can’t move back legs Rear flippers Hunted for skin
and meat
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sea lion (dog face) walks like a quadrupeds tricks in shows
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Walrus Feeds off inverts
from bottom Whiskers for
feeling Tusks for digging
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Sirenia- manatee, dugongs
Italian for mermaid- relative of the elephant
Highly endangered Only vegetarian Skin, oil, meat (like
veal) Front flippers and
fluke
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Cetaceans- whales, dolphins, porpoises
90 species only 5 fresh water
Whales toothed- predators narwhal, killer,
dolphin
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Whales baleen – filter feeders
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a
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broad flat tails (fluke), front limbs modified into flippers, blow hole in nostril
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social animals songs, pod, breaching harem- may have 40 females defense and sex exhausts
defending male in 1-2 years bachelor groups
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ambergris- indigestible squid beaks in sticky mess, used in perfumes
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Humpback whale- feed in the arctic
Breed in Hawaii
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Gray whale migration- summer in the arctic Ocean feeding on schools of krill
Breed in Baja California
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EASY 1. The lower chambers of the heart are called 2. Marsupials and Monotremes composes what
% of mammals? 3. Atridactyls are even or odd toed? 4. Gland in the region of the neck of a rat: 5. Organ that links baby to material circulatory
system. 6. A cloaca would be found in what mammal? 7. Name the sieve like structure in some whales. 8. Marsupials are found mostly where?
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EASY
1. The lower chambers of the heart are called ventricle
2. Marsupials and Monotremes composes what 5% of mammals?
3. Atridactyls are even or odd toed? 4. Gland in the region of the neck of a rat:
thymus 5. Organ that links baby to material circulatory
system. placenta 6. A cloaca would be found in what mammal?
Monotremes platypus, echidna 7. Name the sieve like structure in some
whales. baleen 8. Marsupials are found mostly where?
Australia,New Guinea, New Zealand
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MEDIUM 1. Name 5 marsupials. 2. I’m a pinneped with great legs and a
dog like face. 3. Name two organs in the thoracic
cavity. 4. Another name for vibrissae is 5. If you remove the organs in the
abdominal cavity, what organs are along the back body wall?
6. Blood enters the heart from the body in what chamber?
7. What structures enter and exit the stomach?
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MEDIUM 1. Name 5 marsupials. Koala, Taz.
Kangaroo 2. I’m a pinneped with great legs and a
dog like face. Sea lion 3. Name two organs in the thoracic cavity.
Heart, lungs 4. Another name for vibrissae is whiskers 5. If you remove the organs in the
abdominal cavity, what organs are along the back body wall? kidneys
6. Blood enters the heart from the body in what chamber? Right atrium
7. What structures enter and exit the stomach? Esophagus ,intestines
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DIFFICULT 1. Explain the distribution of marsupials. 2. Explain embryonic diapause. What is
it’s adaptive value? 3. Name the 2 blood vessels that carry
blood to the heart from the body. 4. Birthing a pig is called ________ and
the mom is called a _______ 5. List 3 reasons why “cows are evil”. 6. Describe the first mammal.
Kelsie,.............l . z{... ???
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DIFFICULT 1. Explain the distribution of marsupials.
Australian continent drifts away with no placental mammals to compete with the marsupials. They survive and diversify.
2. Explain embryonic diapause. What is it’s adaptive value? Embryo in uterus will quickly start to develop if joey in pouch dies
3. Name the 2 blood vessels that carry blood to the heart from the body. Anterior and posterior vena cava superior and inferior vc
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DIFFICULT 4. Birthing a pig is called __farrow______
and the mom is called a _sow______ 5. List 3 reasons why “cows are evil”. Require much land space to raise Poor source of protein (high fat and
cholesterol) High antibiotic use, possible cancers
from high red meat diet. 6. Describe the first mammal. Legs out
90 degrees, reptile like,
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STUDY GUIDE FOR MAMMALS(a copy will be handed out)
1. Heart anatomy and blood flow 2. Rat anatomy from dissection lab 3. History and behavior of rats from lab 4. Characteristics of mammals 5. Origin and structure of the placenta 6. Diagram the placenta 7. Characterize specific orders. Monotremes, Marsupials,
Ungulates, Aquatic Mammals 8. Explain why some people consider “cows to be evil”. 9. Explain distribution of marsupials 10. Explain origin of mammals. 11. Trace the digestive system. 12.Know the function of these systems: circulatory,
respiratory, digestive, reproductive, skeletal 13. Notes from text reading