Contains key notes on:
Definitions
Understand why simple, unicellular organisms can rely on diffusion for movement of substances in and out of the cell
Understand the need for a transport system in multicellular organisms
Features of exchange surfaces
Features of transport systems
The role of phloem in transporting sucrose and amino acids between the leaves and other parts of the plant
The role of xylem in transporting water and mineral ions from the roots to other parts of the leaf
Variables which affect transport systems
The origin of carbon dioxide and oxygen as waste products of metabolism and their loss from the stomata of a leaf (excretion)
The composition of the blood: red blood cells, white blood cells, platelets and plasma
the role of plasma in the transport of carbon dioxide, digested food, urea, hormones and heat energy
how adaptations of RBCs make them suitable for the transport of oxygen, including shape, the absence of a nucleus and the presence of haemoglobin
Features for efficient diffusion
How the immune system responds to disease using WBCs, illustrated by phagocytes ingesting pathogens and lymphocytes releasing antibodies specific to the pathogen
The structure of the heart and how it functions
How the heart rate changes during exercise and under the influence of adrenaline
How factors may increase the risk of developing coronary heart disease
Causes of CHD
How the structure of arteries, veins and capillaries relate to their function
The general structure of the circulation system, including the blood vessels to and from the heart and lungs, liver and kidneys
And more…

 
Keywords and concise notes according to the specification and mark scheme
Key diagrams
Past paper fill in the blanks
Table of blood vessels corresponding with organs

 
NOTE: all science notes are DOUBLE AWARD only (NOT triple!!)