Functions of Blood Quiz

transport oxygen and nutrients to all cells of body

maintain body temperature and distributing heat

maintain pH of body fluids

plasma 55% white blood cells and platelets 4% RBC 41%

haematocrit

<p>biconcave shape- flattened in middle on both sides increases surface area for carrying oxygen no nucleus = flexible so can move thru BV</p> Signup and view all the answers

<p>thrombocytes</p> Signup and view all the answers

<p>3, 97</p> Signup and view all the answers

<p>8, 22, 70</p> Signup and view all the answers

<p>1.vasoconstriction muscles in walls of small arteries that have been injured constrict immediately to reduce blood flow hence blood loss</p> <p>2.platelet plug -internal walls of BV are very smooth -but any damage creates a rough surface to which platelets stick -sticking platelets attract others, so plug is built up at site of injury -plug reduce blood loss -platelets release substances that act as vasoconstrictors, which enhance and prolong constriction of damaged vessels *enough for small injuries</p> <p>for MAJOR 3. coagulation: clotting factors present in blood plasma is involved in the formation of blood clot</p> Signup and view all the answers