Transport Flashcards
What is blood plasma
It is a yellow liquid substance that transports the red blood cells
What does the blood plasma carry?
It carries Urea from the liver to the kidney where it is disposed through urine
What do some white blood cells(lymphocytes) form.?
They form antibodies against harmful microorganisms
What are white blood cells
They are blood cells which are bigger than red blood cells and form part of the bodies defence system
Name one adaptation of the red blood cells
They have no nucleus to increase space for haemoglobin
What are red blood cells
The red blood cells carry oxygens to cells that need it
What are placets
Platelets are small fragments of cells. They have no nucleus.
What is a double circulatory system
A double circulatory system is ons where the blood passes through the heart twice to do one complete circuit if the body
Arteries
Take blood away from the heart
Veins
Carry blood towards the heart
Capillaries have
Very thin walls which enables substances like oxygen and glucose to diffuse easily out of the blood and into cells
What are the factors that affect transpiration?
Light, temperature, Humidity and wind speed
How does light affect transpiration?
The more light there is, the more photosynthesis which increases the amount of water the plant has to draw and therefore increasing transpiration.
How does temperature affect transpiration?
Higher temperatures cause the stomata opening to open and lower temperatures cause the stomata opening to close.
How does Humidity affect transpiration?
A humid air makes evaporation hard so the dryer the air, the more transpiration
How does wind speed affect transpiration
Wind causes humid air to be carried away and replaced by dryer air, increasing transpiration
What is translocation?
The movement of sugars from the leaves to the rest of the plant through the phloem
What is transpiration
The loss of water vapour from the leaves of plant through the stomata when they are opened to allow gas exchange for photosynthesis. It involves evaporation from the surface of the cells and diffusion through the stomata
What does the xylem do?
It transports water and salts to the leaf
What does the phloem do?
It transports sugars out of the leaf
What is transpiration stream?
The flow of water through a plant, from the roots to the leaves, via the xylem vessels.
How does plants lose water?
They lose the water through the stomata
What blood vessel brings blood from the legs to the right side of the heart
Vena Cava
What are 2 risks for coronary heart disease
High-fat diet
Smoking
