Nutrients give our cells all the energy they need.
The digestive system the respiratory system
the circulatory system and excretory system
carry out function of nutition.
THE DIGESTIVE SYSTEM
The digestive system it has two parts, the
digestive tract and the digesrive glands.
The mouth has salivary glands that
produce saliva, teeth that chew food and
a tongue that mixes chewed food with
saliva to form a ball of food
The pharynx connects the mouth and the
The oesophagus transports the food to the
The stomach is where the food mixes with
The pancreas helps in the digestion of
THE SMALL INTESTINE
The small intestine is the longest part of the
digestive tract.Nutrients pass into the blood
through its walls.
THE LARGE INTESTINE
The large intestine absorbs water which
passes to the blood .
And finally, undigested substances are
expelled through the anus.
THE RESPIRATORY SYSTEM
The respiratory system is in change of
Breathing makes two movements.
First, we inhale air and it goes into the
Then, we exhale air sending it out of the
The pharynx connet de larynx, the oesophagus
and the trachea.
The larynx contains the vocal cord.
The trachea is a tube that takes air into the
The bronchi are two branches of the trachea
The lungs are spongy organs made up of
small sacs called alveoli.
The diaphragm is the muscle than creates the
When we breathe, the oxygen in the
air goes to the blood through the
alveoli, and the carbon dioxide from the
blood is released outside the body.
THE EXCRETORY SYSTEM
The excretory system filters waste substances
from the blood. It removes them from the body
The excretory system is made up of:
The urinary system. This is made kidneys and
THE URINARY SYSTEM
The kidneys remove waste substances from
the blood and they make urine
The ureters take urine from the kidneys to the
The urethra connets the bladder to the outside.
THE CIRCULATORY SYSTEM
The circulatory system transports nutrents and
oxigen to cells .It is made up of the heart, blood
and blood vessels.
The heart is a muscular organ that pumps
blood around the body.
The blood collects oxygen from the alveoli and
nutrients and transports them to all the cell. It
also collects waste substances and takes them
to the sweat glands and the urinary system.
The blood vessels are the tubes through which.
There are three types: arteries, veins and
The arteries carry blood from the heart to the
rest of the body.
The veins carry blood from all over the boby
back to the heart.
The capillaries are very thin vessels that reach
all the cells of the body.
Blood is a red liquid tissue made up of cells
that float in a liquid called plasma.
There are three types of blood cells, red blood
cells. White blood cells and platelets.
*Red blood cells carry oxygen.
*White blood cells remove bacteria
and viruses from the blood.
*Platelets are small fragments of
Cells tha form blood clots when a
Blood vessel breaks.
The heart use rhythmic systole and diastole
movements to pump the blood around the
The systole is the movement of contraction.
The diastole is the movement of relaxation.
Blood enters the atria through the veins.
Passes to the ventricles and valves that prevent
blood comes out.
Of the ventricles, throug the arteries and travels
all over the body.
Human circulation is closed.In mammals, the
heart septum separates the two halves of the
Human circulation is double. The blood follows
-Pulmonary circulation. The blood carbon dioxide
through the pulmonary artery.
-systemic circulation.The blood with oxygen