The circulatory system

The circulatory system and
bones and skeleton
 Rodrigo Blázquez Sánchez 6ºA Nº10
The circulatory system

The circulatory system is responsible for
circulation. It transports oxygen, nutrients and
many harmful substances to all parts of our
body.The circulatory system consits of the heart
and the blood vessels. The heart and the blood
vessels form a closed circuit, the circulating
blood doesn´t go outside your body. But if you
hurt, you can blood.
The blood vessels
 Arteries.
Carry the blood from the heart
to other organs of the body.
 Veins. They take the blood from the
organs to return to the heart.
 Capillaries. They connect the arteries
with the veins. Their walls are very thim.
They permit substances to pass trough
them.
The heart
 It´s a muscle. Weight
250 grams. This in
the left part of toracic cavity. It pumps
the blood.
 It has two auricles and two ventriculas.
The functions of the blood
 To transport nutrients from the small intestine to
other organs of the body.
 To transport oxygen from the lungs to all of the
organs of the body.
 To pick up from the different organs of the body,
the carbondioxide and other substances that are
harmful to our body.
Bones and skeleton
 Our skeleton consist of all of the organs of the
body.
 The purpose of our skeleton is it support and
give shape to our, protect our internal organs
and provide an attachment place for our
muscles.
Bones of the head
 We have bones in our skull and face:
 Our skull protects the brain and is made up of
flat bones.The main ones are: two parietal
bones, the occipital bone, two temporal bones
and the frontal bone.
 We have fourteen bones in our face.they include
the maxillar and the mandible, where our teeth
are located.
Bones of the trunk
 There are two groups of bones:
 The vertebral column has short bones, called
vertebrae, which have their centre a canal to
protect the spinal cord.We have 33 vertebraes:
Seven cervical vertebrae, twelve thoracic
vertebrae and nine others which in adults are
fused together and form two bones called the
sacrum and the coccyx.
 The chest wall protects the lungs and the
heart.We have seven pairs of ribs that connectly
directly to the sternun, the bone in the centre of
our chest.Three more pairs of ribs connect to
other ribs. The remaining two pairs of the ribs
are called floating ribs.
Bones of the extremities
 We have bones in our arms, legs and feet.
 The three long bones in our legs are the femure,
the tibia and the fibula and a short bone called
the patella at the knee.Short bones in our feet
are the tarsus, the metatarsus and the
phalanges.
 The three long bones in our arm are the
humeros, the uma and the radions.Short bones
in our hands are: the carpus, the metacarpus and
the phalanges.
 Our arm bones are connected to the trunk by the
scapulus and the cavicle, our legs are connected
to the trunk by the ilium.
Our mucles
 Our musculature consist of all muscles of our
body.Our body has over 600 muscles, cuabling
us to strech a leg, more an eyelid, close a hand,
run.
Muscles of the head
 Most of the head are located in the face.Some of
the face muscles are: the risorius muscle, the
orbicularis muscle and the frontal muscles.
 We also have the masseter muscles, which we
use do more our jaws.