Bird Anatomy
A proteinaceous structure that covers a bird and enables flight.
What are feathers?
In mammals and humans, the muscle beneath the lungs that controls breathing by expanding and contracting.
What is the diaphragm?
Animal behavior that promotes mate selection and breeding.
What is courtship?
Marsupials' gestation period is much shorter than eutherians and their young are born earlier and more underdeveloped so the fetus needs more time to grow after birth.
Why must marsupials nurse their young longer than eutherians?
Hollow bones
What type of bones do birds possess?
The voice organ in birds.
What is the syrinx?
In most mammals and humans, the structure consists of a portion of the uterine wall and the chorion of the embryo that allows nutrient and waste exchange between mother and embryo.
What is a placenta?
To keep an egg at a suitable temperature for development and hatching.
What is incubation?
Bats and aquatic mammals
What group of mammals echolocate?
colorful feathers
What is one main distionction of male birds?
One of a series of hollow chambers that form part of the respiratory system of birds.
What is an air sac?
The first chamber in a ruminant stomach.
What is a rumen?
The movement of an organism from one location to another, often seasonally and over long distances.
What is migration?
Mammals have mammary glands that produce milk.
How are mammals different from other vertebrates in the way that they nourish their young?
They go north
Which direction is a bird in the Southern Hemisphere likely to fly as winter comes?
The large ridge on a bird's sternum to which the flight muscles attach.
What is a keel?
A layer of insulating fat beneath the skin of marine mammals.
What is blubber?
What is echolocation?
Rumen stomach structure
Ugandlates that chew cud have what stomach structure?
Wings that are degnised for maneuverability
What are elliptical wings?
A thin-walled portion of the digestive tract in some animals that temporarily stores food prior to digestion.
What is a crop?
An organ of female mammals that produces milk to nourish the young.
What is a mammary gland?
A perching bird's feet automatically lock while perching unless the bird releases them.
How does a perching bird sleep?
Hoofs distinguish them.
What structures distinguish ungulates?
The albumen and the shell
What two layers of a bird's egg protect the embryo?