key Terms

Question 1

Alveolus

Answer 1

A structure inside the lungs where gas exchange takes place with the blood.

Question 2

Antagonistic muscles

Answer 2

A pair of muscles that work together to control a movement at a joint - as one muscle contracts, the other relaxes

Question 3

Bone

Answer 3

A tissue that forms a hard structure, used to protect organs and for movement

Question 4

Cartilage

Answer 4

The strong, smooth tissue that covers the end of bones to prevent them rubbing together.

Question 5

Condense

Answer 5

The change of state from gas to liquid

Question 6

Diaphragm (breathing)

Answer 6

The sheet of muscle used in breathing

Question 7

Exhale

Answer 7

Breathing out, to remove carbon dioxide

Question 8

Gas exchange

Answer 8

The transfer of gases between an organism and its environment

Question 9

Inhale

Answer 9

Breathing in, to take in oxygen

Question 10

Joint

Answer 10

A part of the skeleton where two bones join together

Question 11

Ligament

Answer 11

Joins two bones together

Question 12

Lungs

Answer 12

The organ in which gas exchange takes place.

Question 13

Multicellular organism

Answer 13

An organism made up of many cells

Question 14

Newton

Answer 14

The unit of force, symbol N

Question 15

Organ

Answer 15

A group of tissues working together to perform a function.

Question 16

Organ system

Answer 16

A group of organs working together to perform a function

Question 17

Respiration

Answer 17

A chemical reaction where food and oxygen are converted into energy, water, and carbon dioxide

Question 18

Respiratory system

Answer 18

The organs involved in gas exchange

Question 19

Ribcage

Answer 19

The bones that protect the lungs

Question 20

Skeleton

Answer 20

All the bones in an organism

Question 21

Tendon

Answer 21

Joins a muscle to a bone

Question 22

Tissue

Answer 22

A group of similar cells working together to perform a function