Humans 1
special tubes that carry the blood
blood vessels
rain that contains dissolved nitric oxides or sulfur dioxide; these compounds make the rain acidic
acid rain
rotted vegetables and garden waste that is used as a fertiliser
compost
a living thing (usually an animal) that eats another plant or animal
consumer
the process of breaking down food into very tiny particles
digestion
the organ that controls all body functions
brain
an allergic reaction that causes a person to have difficulty breathing
asthma
removal of trees by humans
deforestation
tiny plants and animals that live in the sea
plankton
an illness which stops your body from working properly
disease
the way we take air into our bodies and let it out of our bodies
breathing
the mixture of gases surrounding the Earth
atmosphere
regions with very little rainfall
desert
a way to describe the feeding relationship between plants and animals
food chain
the process of removing of waste products from the body
excretion
the system formed by the heart, blood vessels and blood to carry food and oxygen around the body
circulatory system
a lung infection that can be caused by polluted air
bronchitis
the gradual increase in temperatures throughout the world
global warming
a consumer that eats other animals
predator
a special muscle that pumps blood around the body
heart
a way to remove wastes from the blood with a machine if the kidneys do not work properly
dialysis
a gas that traps heat causing the temperature of the atmosphere to rise, for example, carbon dioxide
greenhouse gas
where waste products from a town or city are disposed of or buried
landfill
an animal that is eaten by another animal
prey
the organ which breaks down food into tiny particles that can move into the blood; undigested food is pushed out at the end of the intestines
intestines