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21 Cards in this Set

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What are Placentals?
Mammals that give birth to live young.
What monotremes?
Mammals that lay and incubate eggs, such as the duck-billed platypus.
What Marsupials?
Mammals with an external pouch for the development of its immature young.
What are mammals?
Endothermic vertebrates that have hair, well developed lungs, specialized teeth, a nervous system, a 4 chambered heart, and mammary glands.
What are mammary glands?
Milk producing glands
What is a gestation period?
The time in which an embryo develops in the uterus.
What is a placenta?
A sac-like organ in which the embryo develops.
What is an Umbilical Cord?
The structure that connects the embryo to the placenta.
What is the function of down feathers?
To provide an insulating layer next to the skin of birds.
What is the function of contour feathers?
To give a bird its color and are used for flight.
What are ways some ways that a bird's body is adapted for flight?
wings, feathers, hollow bones, fused bones, large breastbone, strong flight muscles, air sacs, well-developed senses, energy
What are hollow and filled with air spaces?
The bones of a bird.
How does the digestive system of a bird work?
Quickly and efficiently
What is a gizzard?
The organ a bird uses to grind its food.
Because of its air sacs, a bird receives oxygen when?
When it inhales and exhales.
What teeth are made for biting and cutting?
incisors
What are some things herbivores eat?
carrots, grass, and lettuce
What teeth are made for gripping and tearing away the flesh of animals?
canines
What are some examples of placentals?
whales, humans, and elephants
What are omnivores?
Mammals that eat both plants and other animals.
Be able to give an example of marsupials, monotremes, and placentals and tell how their young develop.
Be able to compare and contrast the ways that birds and mammals reproduce.