blood

• red blood cells carry oxygen from lungs to tissues
• red blood cells give oxygen to tissues so cells can use it for cellular respiration
• hemoglobin helps red blood cells cary oxygen to muscles and tissues
• lack of hemoglobin can result in cells not getting enough oxygen causing fatigue or dizziness
• oxyhemoglobin is oxygen and hemoglobin combined together
• during respiration in the lungs hemoglobin combines with oxygen forming oxyhemoglobin
• once red blood cells have travelled around the body oxyhemoglobin splits back into oxygen and hemogobin so oxygen can diffuse into the tissues
• oxygen diffuses into the tissues after splitting off with hemoglobin
• one adaptation to red blood cells is that they don't have a nucleus so there is more space for hemoglobin and oxygen
• a second adaptation to red blood cells is that they are biconcave disc shaped for a larger surface area to absorb oxygen
• red blood cells are shaped like biconcave discs
• the red blood cells biconcave shape creates a large surface area to absorb more oxygen
• white blood cells are an essential part for our immune system
• a pathogen is a harmful bacteria
• phago-cy-tosis is where a white blood cell consumes a microorganism
• antibodies is where white blood cells bind onto pathogens and destroy them
• white bloodcell is op
• antitoxins neutralize any toxins that pathogens produce
• white blood cells do have a nucleus
• platelets are small fragments of cells
• platelets have no nucleus
• platelets float in your blood waiting for a cut on the skin
• platelets act like glue and seal the wound
• clotting is when platelets glue the would together
• platelets stop blood from pouring out
• platelets stop microorganisms from getting in
• plasma is a yellow coloured liquid
• red blood cells are 45% of our body
• plasma is 55% of our body
• white blood cells is 1% of our body
• plasma carries red blood cells white blood cells and platelets
• plasma carries nutrients like glucose and amino acid to the cells
• plasma also provides hormones and protein
• the plasma also carries waste products like co2 and urea
• plasma carries antibodies and antitoxins made by white blood cell
• if lots of blood is lost theres not enough to deliver oxygen to tissues
• artificial blood is a blood sub
• artificial blood is made of salt water
• artificial blood adds volume to the circulatory system to keep the vessels full so the heart keeps pumping
• what is two disadvantages of artificial blood?

  it can only replace 1/3rd of our blood and it doesnt contain any red blood cells to transport oxygen to tissues