Empty spaces that fill with air when a bird is flying that provide bird lungs with a continuous flow of air.

Class of Chordata the organisms of which are called birds.

Birds that obtain their food by hunting.

The thick fat layer that insulates in whales and other mammal species that live in the cold waters of oceans.

The part of the brain that controls balance and coordination.

An opening from which a bird releases wastes.

A thin muscle found between the chest cavity and the abdominal cavity that is the "breathing muscle" in mammals.

Feathers made to keep the bird warm.

flight feathers, or contour feathers

Feathers that are specially designed for flight.

The sharp front teeth of meat eating mammals.

A special breast bone on birds, which serves as an excellent attachment point for their flight muscles.

A protein that feathers and skin are made from.

Class of Chordata that includes mammals.

The defining characteristic of mammals, found only on the female to produce milk to feed the young after they are born.

The single lower jaw bone of all mammals.

marsupials (order Marsupialia)

Mammals that give live birth to their offspring at an immature age, and the offspring complete their development in a pouch.

The act of parents caring for and protecting their young.

Birds that have specially-shaped feet, so they can sit on tree limbs for long periods.

A temporary organ that forms between the mother and developing baby, which provides nutrition and gas exchange to the developing baby from the mother's blood stream.

placental mammals (order Placentalia)

Mammals that give live birth to full-term offspring.

Order of Mammalia that includes monkeys and apes. Humans are also classified as primates.

The structure that takes oxygen and nutrition to the baby from the placenta, waste from the baby to the placenta.

Birds that spend a lot of time in and near water.

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Life Science Ch. 16

Vocabulary

Term	Definition
air sacs	Empty spaces that fill with air when a bird is flying that provide bird lungs with a continuous flow of air.
Aves	Class of Chordata the organisms of which are called birds.
birds of prey	Birds that obtain their food by hunting.
blubber	The thick fat layer that insulates in whales and other mammal species that live in the cold waters of oceans.
cerebellum	The part of the brain that controls balance and coordination.
cloaca	An opening from which a bird releases wastes.
diaphragm	A thin muscle found between the chest cavity and the abdominal cavity that is the "breathing muscle" in mammals.
down	Feathers made to keep the bird warm.
excrete	To release wastes.
exhalation	Breathing out.
feather	The defining feature of birds.
flight feathers, or contour feathers	Feathers that are specially designed for flight.
flightless birds	Birds that cannot fly.
incisors	The sharp front teeth of meat eating mammals.
inhalation	Breathing in.
joey	A kangaroo baby.
keel	A special breast bone on birds, which serves as an excellent attachment point for their flight muscles.
keratin	A protein that feathers and skin are made from.
Mammalia	Class of Chordata that includes mammals.
mammary glands	The defining characteristic of mammals, found only on the female to produce milk to feed the young after they are born.
mandible	The single lower jaw bone of all mammals.
marsupials (order Marsupialia)	Mammals that give live birth to their offspring at an immature age, and the offspring complete their development in a pouch.
monotremes (order Monotremata)	Mammal species which lay eggs.
ornithologists	Scientists who study birds.
ornithology	The study of birds.
parental care	The act of parents caring for and protecting their young.
perching birds	Birds that have specially-shaped feet, so they can sit on tree limbs for long periods.
placenta	A temporary organ that forms between the mother and developing baby, which provides nutrition and gas exchange to the developing baby from the mother's blood stream.
placental mammals (order Placentalia)	Mammals that give live birth to full-term offspring.
Primates	Order of Mammalia that includes monkeys and apes. Humans are also classified as primates.
umbilical cord	The structure that takes oxygen and nutrition to the baby from the placenta, waste from the baby to the placenta.
water birds	Birds that spend a lot of time in and near water.

Created by: lafleurs

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