LEVELS
THE CELL
DIGESTIVE SYSTEM
CIRCULATORY SYSTEM
NERVOUS AND ENDOCRINE SYSTEMS
100
A group of differenciated cells that perform the same functions

Tissue

100

It is the control centre of the cell

The nucleus

100

These are the two types of digestion

Mechanical and chemical

100

Red blood cells are red because they carry this protein inside them.

Haemoglobin

100

This is the name of the nervous system cell.

Neuron

200

The basic unit of a living organism.

The cell

200

Organelle in charge of the cellular respiration

Mitochondria

200

These two glands help in the digestion of some kinds of nutrients like lipids and proteins

Liver and pancreas

200

Cell fragments present in blood that help heal wounds.

Platelets

200

These cells are important in nurturing and supporting neurons.

Neuroglial cells

300

One or different tissues organise to form THIS in order to perform specific functions.

An organ

300

These are undifferentiated cells and can produce different types of cells

Stem cells

300

It is where absorption takes place within the digestive system.

Small intestine

300

Blood vessels carrying blood outside the heart are called...

Arteries

300

These are the two types of nervous systems.

Central and peripheral

400

True or false? All organs are made up of the same tissue.

False

400

These organelles contain digestive enzymes in the cell

Lisosomes

400

These specialised proteins help break down the food into its components so they can be absorbed.

Enzymes

400

The heart has four chambers. Their names are...

Atriums and ventricles (2 left and 2 right)

400

These are released in the space between neurons during synapsis.

Neurotransmitters

500

It is an association of organs that work together to perform vital functions.

System or apparatus

500

Organelle which specialises in producing proteins

Ribosome

500

These movements help food move in the digestive tube, for example, in the oesophagus and stomach.

Peristaltic movements

500

These are the two most important gases that blood carries.

Oxygen and carbon dioxide

500
This is the way that neurons communicate with each other.

Synapsis