Unit 2 Topic 6 - Transport Systems In Animals
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What are the 3 main parts of the circulatory system?
• blood vessels • heart • blood
Which side of the heart pumps deoxygenated blood to the lungs?
Right
Which side of the heart pumps oxygenated blood to body cells?
Left
What do arteries do?
Carry blood away from the heart
What do veins do?
Carry blood back to the heart
What do capillaries do?
Carry blood to and from body cells
What are the 3 main types of blood vessel?
• artery • capillary • vein
Why is the wall of the left ventricle thicker than the right ventricle?
Because it has to pump blood to the whole body
State the flow of blood
💙Right atrium↓ 💙Vena cava↑ 💙 Right ventricle↓ 🧍 Body↑ 💙Pulmonary artery↓ ❤️Aorta↑ 🫁Lungs↓ ❤️↑ left ventricle← Left atrium ❤️
Describe the features of an artery
They have thick muscular walls and a narrow central channel
Describe the features of a vein
They have thin walls, a large central channel and contain valved to prevent back flow of blood
Describe the features of a capillary
They have thin walls and a large surface area to allow efficient exchange of materials
What pigment does red blood cells contain?
Haemoglobin
What is the shape of red blood cells described as?
Biconcave
Why are red blood cells biconcave ?
To create a large surface area for gas exchange
What does haemoglobin do?
Binds with oxygen in the lungs
How do phagocytes destroy pathogens?
By carrying out phagocytosis, when they engulf and destroyed pathogens by producing digestive enzymes
How do lymphocytes destroy pathogens?
By creating antibodies specific to the antigen