transport in animals

• circulatory system is a system of blood vessels with a pump and valves to ensure one-way flow of the blood
• atrio ventricular valve is tricuspid valve and bicuspid valve
• semi lunar valves are pulmonary and aortic valve
• septum prevents oxygenated and deoxygenated blood from mixing
• ventricles have thicker muscular walls that the atria
• CHD is when the coronary artery blocked leading to blood starvation in the heart muscles
• blood vessels are tubes which blood circulates in the body
• arteries carry oxygenated blood away from the heart
• veins carry deoxygenated blood towards the heart
• capillaries connect arteries and veins
• capillaries provide an exchange of oxygen, nutrients and waste products between blood and the body cells
• arteries divide in arteriole
• vein divide in venule
• plasma transport blood cells, ions, nutrients, urea, hormones and carbon dioxide
• WBCS types are phagocytes and lymphocytes
• platelets form blood cloth to stop bleeding and prevent infection by not allowing pathogens to enter
• red blood cell is biconcave disc shape with no nucleus or organelles
• RBC has haemoglobin which binds to O2 and carries it around the body
• oxygenated RBCs have red colour due to oxyhemoglobin
• role of septum

  prevent oxygenated blood and deoxygenated from mixing