Please enable JavaScript.
Coggle requires JavaScript to display documents.
The Heart (Blood vessels (Veins (Carry blood to the heart
Have thin walls…
The Heart
Blood vessels
Veins
Carry blood to the heart
Have thin walls
LOWEST BLOOD PRESSURE
Have valves to prevent blood flowing backwards
Capillaries
Found in the muscles and lungs
microscopic (one cell thick)
Very low blood pressure
Where gas exchange takes place- oxygen passes through the capillary wall and into the tissues, carbon dioxide passes from the tissues into the blood.
Arteries
Carry blood away from the heart
Have thick muscular walls
Have small passageways for blood
HIGHEST BLOOD PRESSURE
Vena Cava (Superior/ Inferior) -> Deoxygenated-> from body to right atrium
Pulmonary artery -> Deoxygenated -> from right ventricle to lungs
Pulmonary vein-> Oxygenated-> from lungs to left atrium
Aorta -> Oxygenated-> from left ventricle to body
Blood
Platelets
Clump together to form clots
Clots present pathogens from entering the blood
Protect the body by stopping bleeding
White blood cells
Lymphocytes
Produces specifically shaped (to fit a certain pathogen) antibody
Antibodies recognise pathogens and stir to the surface of them
They : cause bacteria to stick together;
act as a label so pathogen is recognised by a phagocyte;
cause pathogen to burst open;
neutralise the poison produced by the pathogen
-
Vaccinations
Inject pathogens into the body so lymphocytes produce antibodies in the right shape to store, or remember the shape so they can be produces quicker
Plasma
Fluid part of blood
Carries Carbon Dioxide, hormones and waste
Red blood cells
Contains haemoglobin which carries oxygen
Has bio concave shape to increase surface area to volume ratio
Bendy so they can fit through spaces
No nucleus to make space for more oxygen/ haemoglobin
Heart Rate
Exercise
We need to supply our muscles with more oxygen for respiration. To achieve this the heart must beat faster and pump more blood
Adrenaline
This hormone causes heart rate to increase supplying extra oxygenate the muscles, releasing more oxygen through respiration. (fight or flight)