Transport Systems

HideShow resource information
View mindmap
  • Transport Systems
    • Large animals transport systems
      • Size - larger animals cannot gain oxygen and nutrients by diffusion alone need transport systems
      • Surface area to volume ratio - large animals have a small SA:V ratio
      • Level of Activity -  the more active an animal the oxygen and nutrients it needs
    • Features of a good transport system
      • A fluid of medium to carry nutrients and oxygen around the body (blood)
      • A pump to create pressure that will push the fluid around the body (heart)
      • Exchange surfaces that enable oxygen and nutrients to enter the blood and to leave it again where they are needed
      • Tubes or vessels to carry the blood
      • Two circuits -  one to pick up oxygen and another to deliver oxygen to the tissues
    • Single and double circulatory systems
      • Single circulatory -  blood flows in a continuous loop doesn't go to the same place twice in one circuit (Fish have)
      • Double circulatory - two different 'loops' (Mammals have)
        • One loop carries blood tot he lungs to pick up oxygen (Pulmonary circulation)
        • Other loop carries the oxygen and nutrients around the body to the tissues (Systemic Circulation)


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Biological molecules, organic chemistry and biochemistry resources »