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Endothermic vertebrate with hair Warm-blooded Permits high level of activity at night and year- round (regardless of outside temperature) Females have.

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Presentation on theme: "Endothermic vertebrate with hair Warm-blooded Permits high level of activity at night and year- round (regardless of outside temperature) Females have."— Presentation transcript:


2 Endothermic vertebrate with hair Warm-blooded Permits high level of activity at night and year- round (regardless of outside temperature) Females have mammary glands Function: make/secrete milk for young About 5000 species Ex: cats, dogs, humans, dolphins, elephants, kangaroo, whale, bat, rabbit, beaver, wolf, seal, mouse, platypus, chimpanzee, tiger

3 High degree of parental care Body covered by hair In some, hair is reduced in size – like humans All have an integument (external covering) Contains: sweat, scent, sebaceous and mammary glands

4 Breathe using lungs Excrete using kidneys Separate sexes Young nourished by milk (made by the mammary glands) Many have territories These are areas from which individuals of the same species will reside Will often resort to violence to protect these territories

5 Rodents Ex: mice, squirrels, rats, woodchucks Have two razor sharp incisors for gnawing Lagomorpha Ex: rabbits, hares, pikas All are herbivores Hominids Ex: humans, gorilla, orangutan, chimps Insectivora Ex: moles, shrews Diet consists of insects

6 Carnivora Ex: weasels, seals, walruses, dogs, wolves, cats, bears Highly predatory animals, Contain teeth for tearing flesh Proboscidea Ex: elephants Largest of living land animals

7 Perissodactyla Ex: horses, donkeys, zebras, rhinos Often referred to as ungulates or the hoofed animals Cetacea Ex: dolphins, whales, porpoises Limbs are modified into flippers Live in aquatic environments only

8 Skeleton Skeletal/bone make-up allows for: High-speed running Swimming climbing trees Movement of digits (fingers/toes) to help grasp objects Joints allow for a greater range of motion

9 Hair: Has become a modified sense organ Purpose of hair: Spines of porcupinesprotection Hair of most animalsinsulation Vibrissae (whiskers)provide tactile sense Slightest movement indicates minimal space available (cat/dog)

10 Moveable eyelids Fleshy external ears Well-developed brain The largest brain in animal kingdom Cerebrumprocesses info for thinking and learning High evolved brain allows for highly developed memory and capacity to learn topics/developmental milestones quicker

11 Highly elaborate sensory organs Provide mammals with a high level of environmental awareness and responsiveness Senses: taste, smell, hearing, sight Most have great eyesight Many cant see color Many will use echolocation to communicate and/or navigate Ex: Bats, dolphins

12 Teeth Mammalian teeth are both more complicated and more efficient than in other vertebrates Mammals are heterodonts (some of our teeth are different) Specialized for variety of functions: Includes: grind, stab, scissor, dig, chisel, sieve and lift (elephants tusks)

13 Teeth, cont. Teeth in mammals come in four different sorts: Incisors, Canines, Premolars and Molars. Not all mammals have all Use this variety to eat a wide variety of food Most placental mammals have between 20 and 40 teeth, while most marsupials have 30 to 50. As a general rule animals that feed on insects have more teeth than either herbivores or the larger carnivores.

14 Contain a secondary palate Separates air passageway from the food passageway Allows mammals to hold (and partially break down food) in mouths without interrupting breathing

15 Have many feeding adaptations Insectivores are often small Herbivores have two groups Groups: browsers and grazers Have large molars adapted for grinding Carnivores have large canines Adapted for ripping/tearing meat Other adaptations: Ruminants (cattle, bison, goats) have a four- chambered stomach

16 Energy and Wastes Require much energy to keep a constant body temp Produce a variety of waste products (uric acid, urine, feces, etc) Digestive tract If mammals eats only plants, longer digestive tract Why? takes longer to digest plants/cellulose If eat only meat, shorter digestive tract

17 Require a large amount of oxygen for respiration 2 organ adaptations for this: Diaphragm: Muscle that contracts and therefore, allows for more rapid/controlled breathing Four-chambered heart: Separates blood into oxygen-rich/oxygen- poor

18 All have internal fertilization All have mammary glands 3 groups of Mammal life cycles: 1. Placental: 2. Marsupials: 3. Monotremes:

19 Placental: Placental: Develop inside mothers body 95% of mammals are this Placentaorgan which allows for nutrients, oxygen, carbon dioxide and wastes to be exchanged

20 Placental Placental, cont.: Gestation periodtime that embryo stays in the mothers body Humans: 9 months, Elephants: 27 months, Mice: 21 days Mammary glandyoung continue to feed by suckling Ex: humans, dolphin, elephant, most mammals

21 Marsupials: Marsupials: Give birth to small, immature young that develop in a mothers external sac (kangaroo) Mothers can move around and look for food while baby develops in the pouch Ex: kangaroo, koala, panda Monotremes: Monotremes: Mammals that give birth by laying eggs Incubate using her heat Ex: platypus

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