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The Circulatory System by Mind Map: The Circulatory System
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The Circulatory System

The Heart

Left side

oxygenated, to body

Right side

deoxygenated, to lungs

Atria

entrance

Ventricles

exit

Valves

prevent backflow

Speeds up due to

exercise, more oxygen to muscles, higher rate of cellular respiration

adrenaline

Arteries

Away from heart

Aorta, Pulmonary Artery, to lungs, Renal Artery, to kidney, Hepatic Artery, to liver

Structure

Veins

In to heart

vena cava

pulmonary artery

Structure

thinner than artery, blood flows at lower pressure

valves to stop backflow

Capillaries

Narrow

blood flows slowly, more time for diffusion

Thin walls

diffusion easier

The Blood

Platelets

Clotting, prevents blood loss, prevents entry of microbes

White blood cells

Plasma

transports, Products of digestion, glucose, Carbon dioxide, Heat, Hormones, Urea

Red Blood Cells

biconcave, large surface area

Contain Haemoglobin, Carry oxygen

The Immune System

Defends against...

Pathogens, viruses, e.g. influenza, bacteria, e.g. salmonella, fungi, e.g. athlete's foot, protoctists, e.g. maleria

Phagocytes

engulf bacteria, digest using lysozyme

Lymphocytes

produce antibodies, specific to...

Vaccination

produces memory cells, future antibody production, faster, sooner, greater quantity

Only multicellular organisms

smaller surface area to volume ratio than unicellular organisms which rely on diffusion

Effect of Smoking

Build up of fatty deposits on arteries

Arteries become narrow, Less blood flow, Less oxygen, more chance of heart attack or stroke

High blood pressure