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transport system

QuestionAnswer
Define diffusion The passive movement of molecules or particles along a concentration gradient or from regions of higher to lower concentration
Describe mass flow The more active an organism is, the more nutrients are likely to be required by cells and so the greater is the need for an efficient system for internal transport
Name four chambers of the heart right atrium, left atrium, right ventricle, left ventricle
Explain double circulation blood flows from right of the heart to the lungs/back to left side of the heart/pumped around the rest of the body and back to the right side of the heart
State cells inside plasma red cell (erythrocytes), white cell (leucocytes), platelets
Describe the function of red and white cells inside plasma Red cell = transport of respiratory gases White cell = combat infection
Describe the roles of arteries, veins and capillaries Arteries = carry blood away from the heart Veins = carry blood back to the heart Capillaries = link arteries and veins
State on difference of arteries and veins Arteries have thicker and stronger than those of the veins
Explain pulmonary circulation and systemic circulation Pulmonary = pumping deoxygenated blood to the lungs, arteries, veins and capillaries serving the lungs Systemic = oxygenated blood to the rest of the body
State the steps of systemic circulation aorta - artery - arteriole - capillary - venule - vein - vena cava
What maintains the direction of blood flow through the heart Valves
Outline the cardiac cycle Atrium muscles contract - atrium muscles relax - ventricle muscles contract - ventricle and atrium muscles relax - blood flows into the atrium and opens the bicuspid valve as it starts to flow into the ventricle
What does increase in pressure do force the blood to a region where pressure is lower
What is the pacemaker Regulates heart beat
Define pathogen An organism or virus that causes a disease
Created by: jjunigoon
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