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THE HEN
The hen is a living being, it
performs the three vital
functions.
THE FARM
NUTRITION
The hen is a heterotrophic animal because
it feeds on organic matter that is
produced by other living beings. It is
omnivorous and insectivorous.
Nutrition involved 4 systems…
DIGESTIVE
SYSTEM: it consists
of different parts.
:
They have double closed
circulatory system; the
blood passes through
the heart twice
completing to loops.
Respiratory system
chickens breathe
through lungs and take
air by processes of
inhalation and
exhalation. The lungs of
birds are different to
humans
EXCRETION
- The birds have two
kidneys
- Urine is formed through
a filtration
- They don’t have
bladder
- The urine is passed to
the cloaca by the
ureters
- They excrete in form of
uric acid (ácido úrico)
INTERACTION
STIMULI RECEPTORS CORDINATION
SYSTEMS
RESPONSIVE
ORGANS
SENSE SENSE ORGAN FUNCTION
Sight Eyes Detect light
Smell Nose Detect chemical
substances dissolved in air
or water
Taste Tongue they Detect chemical
substances substances
dissolved in water. Hens
can’t detect
Hearing Ears Detect sound
Touch Skin Detect pressure, touch,
pain and temperature
changes
RECEPTORS
- Their nervous system
consists of the brain, spinal cord,
cranial nerves and spinal nerves.
- Birds have the brain more
developed than reptiles, fish and
amphibian.
3.RESPONSIVE ORGANS
3.1MOTOR RESPONSES
MUSCLESSKELETON
3.2 ENDOCRINE RESPONSES
Endocrine responses are controlled by
glands in endocrine system these glands
produce hormones which:
Are released into
Control and coordinates activities.
REPRODUCTION
In this biological
process new
individuals are
produced.
HEN REPRODUCTION
- It has sexual reproduction requires two parents
(male and female).
- It is unisexual.
- It has internal fertilization.
- It is oviparous
HABITAT
The hen is a farm animal.
They are spread over almost all over the
world, and this is because its domestication
and commercialization of its meat, eggs and
feathers.
THANKS FOR YOUR
ATTENTION

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The hen