to carry nutrients and oxygen to and remove waste from the cells of the body. the function
TRANSCRIPT
To carry nutrients and oxygen to and remove waste from
the cells of the body.
The Function
What makes up the circulatory system?
1. Heart
2. Blood
3. Blood vessels
Blood travels from the heart to
the body through blood
vessels.
There are 3 types of blood vessels:
1. ARTERY
2. VEIN
3. CAPILLARY
What is in the…
red blood cells
white blood cells
platelets
plasma
carbon dioxide
digested food
waste (urea)
hormones
oxygen
The Blood
plasma
red blood cell white blood cell
platelets
Red Blood Cells- contain hemoglobin, a molecule specially designed to hold oxygen and carry it to cells that need it.
- can change shape to an amazing extent, without breaking, as it squeezes single file through the capillaries.
- a biconcave disc that is round and flat without a nucleus
White Blood CellsThere are many different types and all contain a big nucleus.
The two main types are the lymphocytes and the macrophages.
Some lymphocytes fight disease by making antibodies to destroy invaders by dissolving them.
other lymphocytes make antitoxins to break down
poisons.
Macrophages ‘eat’ and digest micro-organisms .
Plasma
A yellow-colored liquid that carries the cells and the platelets which help blood clot.
• carbon dioxide
• glucose
• amino acids
• proteins
• minerals
• vitamins
• hormones
• waste materials like urea.
It also contains useful things like:
Platelets
Platelets are bits of cell broken off larger cells.
Platelets produce tiny fibrinogen fibers to form a net. This net traps other blood cells to form a blood clot.
The Heart
ARTERIES - carry blood
away from the heart
Now let’s look inside the HEART…
VEINS – bring blood
toward the heart
The HeartAorta
Basic Heart
RA LA
RV LV
4 chambers:
- 2 atria (A)
- 2 ventricles (V)
How does the Heart work? (9 steps)
STEP ONE Deoxygenated blood from body travels through VENA CAVA to the heart
Vena Cava is the largest vein in the
body.
blood from the body
• The heartbeat begins when the heart muscles relax and blood flows into the atria.
• Both atria fill with blood at the same time.
STEP TWO Right Atrium
Remember: Blue NO oxygen Red has oxygen
• The atria then contract and the valves open to allow blood into the ventricles.
• Both ventricles fill with blood at the same time.
STEP THREE Right Ventricle
The valves close to stop blood flowing backwards.
The ventricles contract forcing the blood to leave the heart and go to the lungs.
At the same time, the atria relax and fill with blood.
STEP FOUR Lungs
STEP FIVE Blood picks up oxygen
Gas exchange occurs in the lungs where blood picks up oxygen.
blood from the body
blood from the lungs
• The heart beat begins when the heart muscles relax and blood flows into the atria.
• Both atria fill with blood at the same time.
STEP SIX Left Atrium
Blood now has OXYGEN
Remember: Blue NO oxygen Red has oxygen
The left ventricle is the strongest chamber in the heart because it has to pump blood to the whole body.
STEP SEVEN Left Ventricle
STEP EIGHT Oxygenated blood travels from heart
through AORTA• Aorta transports oxygenated blood to all parts of the body.• Aorta is the largest artery in the body.
STEP NINE
Blood travels through body to
organs and drops off oxygen.
Lungs
Body cells
Our circulatory system is a double circulatory system.
This means it has two parts parts.
the right side of the
system deals with
deoxygenated blood.
the left side of the
system deals with oxygenate
d blood.
Aorta
Superior Vena Cava
Tricuspid Valve
Inferior Vena Cava
Mitral Valve
Descending Aorta
Aortic Valve
R Atrium
R Pulmonary
Veins
R Pulmonary
Artery
R Ventricle
L Pulmonary
Artery
L Pulmonary
Veins
L Atrium
L Ventricle
Tuesday 4/23/13
Which type of muscle would be found in the large intestines?
How do you know?
Pick up a red & blue colored pencil or marker
Aorta
Superior Vena Cava
Tricuspid Valve
Inferior Vena Cava
Mitral Valve
Descending Aorta
Aortic Valve
R Atrium
R Pulmonary
Veins
R Pulmonary
Artery
R Ventricle
L Pulmonary
Artery
L Pulmonary
Veins
L Atrium
L Ventricle