2. 1. Nutrition.
2. The digestive system.
3. The respiratory system.
4. The excretory system.
5. The circulatory system.
6. Human circulation.

3.  The function of nutrition is essential to life.
Nutrients give our cells all the energy
they need.
 The digestive system, the respiratory
system, the circulatory system and the
excretory system carry out the function
of nutrition.

4.  The digestive system
transform food into
nutrients.
 It has two parts:
• Digestive tract.
• Digestive glands.

5.  The respiratory system
is in charge of
breathing.
 Breathing makes two
movements:
• Inhale air an it
goes into to the
lungs.
• Exhale air
sending it of the
lungs.

6. The urinary system. The sweat glands.
The urinary system is made up Sweat glands are in the skin
of: and they produce sweat.

7.  It transports nutrients
and oxygen to our
cells.
 It is made up of:
• The heart.
• The blood.
• The blood vessels.

8.  Blood is a red liquid
tissue made up of
cells that float in a
liquid called plasma.
 There are different
types of blood cells:
• Red blood cells.
• White blood cells.
• Platelets.

9.  The heart uses rhythmic movements to pump
the blood around the body.
 This movements are:
• Systole: Movement
of contraction. .
• Diastole: Movement
of relaxation.

10.  The blood vessels are tubes through
which blood circulates.
 There are three types of blood vessels:
• Arteries.
• Veins.
• Capillaries.

11.  Human circulation is closed, the heart
septum separates the two halves of the
heart.
 Human circulation is double, the blood
follows two routes.
• Pulmonary circulation.
• Systemic circulation.