Heart
State the missing components pulmonary vein > _____ > _______> Vena Cava
Left atrium, left ventricle
one cell thick, for diffusion of O2 and CO2
what are the components of blood
red blood cells, white blood cells, platelets and plasma.
What is a pathogen
a disease-causing organism
Name the part and chamber that receives blood from the rest of the body
Vena Cava and right atrium
Describe the components in veins
bigger lumen, thinner muscle, elastic tissue.
lower blood pressure, returning to the heart.
What is the role of red blood cells
transport oxygen. Haemoglobin hold onto O2
What two components are in infections
viral or bacterial
Name the part of the heart that transports blood to the rest of the body
Aorta
What components are in arteries and why arteries have these
smaller lumen, muscles and elastic fibres, endothelium.
moves away from the heart. higher blood pressure in arteries
What does a phagocyte do?
What does a lymphocyte do?
Phagocytes eat pathogens
Lymphocytes scan pathogens and create antibodies to mark foreign pathogens.
Why should you always finish your course of antibiotics if prescribed a course?
To fully kill harmful bacteria and prevent bacterial resistance.
Name the part of the heart that transports blood from the heart to the lungs
When physical activity increases, heart rate ______
increases.
What do platelets do
Clot
What are the features and purpose of the alveoli
it is a small sac where the site of diffusion occurs. This is where the exchange of O2 and CO2 happens. Its large surface area facilitates diffusion.
What are the causes of CHD (coronary heart disease)
poor diet, lack of exercise and smoking.
What is Coronary Heart Disease
the blockage of the coronary arteries.
What is the purpose of blood clotting
prevent blood loss and entry of pathogens
What is the purpose of diaphragm
contraction to inhale, relaxation to exhale.