Science Vocab. Chapter 9 Test 2

Front 1

notochord

Back 1

A flexible rod that supports a chordate’s back just below the nerve cord.

Front 2

vertebra

Back 2

The bones that make up the backbone of an organism. In humans, the 26 bones that make up the backbone.

Front 3

ectotherm

Back 3

An animal whose body temperature is determined by the temperature of its environment.

Front 4

endotherm

Back 4

An animals whose body temperature is regulated by the internal heat animal produces.

Front 5

fish

Back 5

A vertebrate whose body temperature is determined by the temperature of its environment, and that lives in the water and has fins.

Front 6

amphibian

Back 6

A vertebrate whose body temperature is determined by the temperature of its environment, and that lives its early life in water and its adult life on land

Front 7

reptile marsupial

Back 7

A vertebrate whose temperature is determined by the temperature of its environment, that has lungs and scaly skin, and that lays eggs on land.

Front 8

bird

Back 8

A vertebrate whose body temperature is regulated by its internal heat, lay eggs, and has feathers, and a four-chambered heart.

Front 9

mammal

Back 9

A vertebrate whose body temperature is regulated by its internal heat, and that has skin covered with hair or fur and glands that produce milk to feed its young.

Front 10

mammary gland

Back 10

An organ in female mammals that produces milk for the mammals\’s young.

Front 11

monotreme

Back 11

a mammal that lays eggs.

Front 12

marsupial

Back 12

A mammal whose young are born at an early stage of development, and which usually continue to develop in a pouch on their mother’s body.

Front 13

placentalmammal

Back 13

A mammal that develops inside its mother’s body until its body systems can function independently.

Front 14

placenta

Back 14

An organ in most pregnant mammals, including human, that links the mother and the developing embryo and allows for the passage of materials between them.

Front 15

cartilage

Back 15

A connective tissue that is more flexible than bone and that protects the ends of bone and keeps them from rubbing together.