Keywords: oxygenated blood, deoxygenate blood, energy, walls, plasma, haemoglobin
B2 Topic 3 Common systems
This topic looks at:
• Fossils and evolution
• The heart, blood and circulation
• Digestion
What are the main components of blood and what do they do, add pictures to
each component.
What is a fossil?
Why are there gaps in the fossil record?
Growth in animals involved cell division what is the name for this?
What are arteries, veins and capillaries. Describe and draw each below
Stem cells are formed, what are these? How are they different from
specialised cells?
Label this diagram of the heart
Keywords: muscle, growth,
Describe the route of the blood around the heart.
Keywords: gall bladder, oesophagus, kidney, liver, small intestine, large intestine
B2 Topic 3 Common systems
Label the digestive system and explain what each does.
This topic looks at:
• Fossils and evolution
• The heart, blood and circulation
• Digestion
Why does food need to be broken down?
What are the main food groups?
Growth in animals involved cell division what is the name for this?
Stem cells are formed, what are these? How are they different from
specialised cells?
For each food group label what it needs to be broken down into and the
enzyme used to break it down.
Carbohydrates 
Fats 
Proteins 
Keywords: enzymes, acidic
Explain what peristalsis is draw a diagram to aid your explanation.
Keywords: surface area, absorption, capillaries, nutrients,
B2 Topic 3 Common systems
Explain the journey of a ham and cheese sandwich through the body
This topic looks at:
• Fossils and evolution
• The heart, blood and circulation
• Digestion
What is the role of bile in the digestive system.
What are villi and why are they important in digestion?
(how does their shape affect the rate of absorption?)
What are probiotics and prebiotics?
Coeliac disease This is an disease which damages the villi in the small
intestine. What problems could this cause?
Keywords: digest, bacteria