1. SCIENCE
UNIT 2
ANIMALS

2. • The Characteristics of animals
Animals are multicellular organisms.They are
consumers. This means they feed on other living
things. Their cells group together as tissues
which form organs and systems.

3. • The nutrition function in animals
There are four processes:
- The taking and digesting of food.
- The taking of oxygen.
- The distribution of sustances.
- The excretion os residues.

4. For digestion most animals have a digestive
system.
The simplest is a digestive cavity. Most have a
digestive tract.
They have different organs, like the stomach and
the intestines.

5. • The interaction function in animals
Animals have sense organs, or receptors, which
detect stimuli.
Animals have a nervous system which processes
information from the receptors, elaborates a
response and sends instructions to the effectors.
The effectors execute the instructions of the
nervous system.

6. Lesson vocabulary
Consumer: consumidor
To feed: alimentarse
To take: tomar
To digest: digerir
To distribuit: distribuir
Cavity: cavidad
Receptors: receptores
Stimuli: estímulo
To elaborate: elaborar
Response: respuesta
To send: enviar
Effector:efector
Instruction: instrucción