The Blood

• As cross sectional area increases, what does mean velocity of blood flow through vessels do?

  Decrease
• What does plasma look like?

  Pale yellow liquid
• What does plasma carry around the body?

  red and white blood cells, platelets, digested food products (glucose and amino acids), carbon dioxide, urea, hormones, antibodies
• What do red blood cells contain to carry oxygen round the body?

  Haemoglobin
• What is the term for what is produced when haemoglobin and oxygen bind?

  Oxyhaemoglobin
• Name and explain 2 adaptions of red blood cells?

  Biconcave shape - Large SA:V ratio so more oxygen can be absorbed

  No nucleus - more space for more haemoglobin, so more oxygen can be carried