Circulation Flashcards
Blood
Watery plasma red blood cells white blood cells platelets
Circulation system
Blood arteries veins capillaries heart
Red blood cells
Contains haemoglobin to carry oxygen
White blood cells
Protect the body make antibodies
Platelets
Clot blood
functions of blood
Transport and protection
Arteries
Thick walls narrow lumen no valves carry blood away from the heart
Veins
Thin wall a wide lumen have valves and carry blood to the heart
Capillaries
Link arteries and veins . Walls are one cell thick, allow for passage of materials
Cardiac muscle
Muscle in the heart, it never tires
Four chambers of the heart
Right and left atria right and left ventricles
Left ventricle
Thick wall because it pumps blood all around the body
Normal body temperature
37*C
Average resting heart rate
70 bpm
Heart disease is prevented by
Good diet, don’t smoke, exercise & avoiding stress