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Bio - Organisation

Biology - Organisation - the heart

QuestionAnswer
How does blood enter the heart? through the atria
How does blood leave the heart? through the main arteries: the aorta (left side) and pulmonary artery (right side)
How does blood enter the right atrium? through the vena cavae
How does blood enter the left atrium? through the pulmonary veins
What prevents blood from flowing backwards? heart valves
What are the 3 types of blood vessels? arteries, veins & capillaries
What are 'arteries'? blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body
What are 'veins'? elastic blood vessels that transport blood from various places in the body to the heart
What are 'capillaries'? very thin blood vessels
What type of pressure system do arteries (arterial system) have? high pressure
What type of pressure system do veins (venous system) have? low pressure
Which type of blood vessels are so small that red blood cells have to flow through them single file? capillaries
What shape are arteries? muscular tubes lined with smooth tissue and 3 layers
What are the 4 main components of blood? plasma, red blood cells, white blood cells & platelets
What are 3 functions of blood? transporting oxygen, transporting nutrients & forming blood clots
What can 'coronary arteries' become blocked with? fatty material caused by 'bad' cholesterol
How can you fix blocked coronary arteries? a stent can be inserted to restore and maintain blood flow
What are stents made from? metal alloys
What do 'phloem' cells do? transport food made in the leaves to other parts of the plant
What do 'xylem' cells do? transport water & nutrients from roots to stems & leaves
Where do plants make food? in their leaves
What makes leaves green? a pigment called chlorophyll
What is photosynthesis the process of making food using carbon dioxide, water, nutrients & energy from the sun
What is transpiration? how moisture is carried through plants from roots to leaves and evaporates
What are the 2 main functions of transpiration? Cooling the plant & pumping water & minerals to the leaves for photosynthesis
Created by: samfitter
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