Flashcards in Blood Deck (18):
What is the structure of the human heart perfectly adapted for?
Pumping blood to your lungs and your body.
Where does blood enter and what is it called?
The top chamber of your heart, it is called the atria.
What happens when the atria contact each other?
It forces blood down the ventricles.
What happens when the blood is pumped into the pulmonary artery and aorta?
The valves close and make sure the blood flows in the right direction.
Why is the muscle wall of the left ventricle thicker than the right ventricle?
Allows the left ventricle to develop the pressure needed to force the blood the arterial system (left ventricle)
If the supply of oxygen to the heart muscle reduced, what happens?
Pain, a heart attack and even death.
What is a stent?
A stent is a metal mesh that is placed in the artery.
What can a stent be used for?
Stents can be used to open up a blocked artery almost anywhere in the body.
What does bypass surgery replace?
It replaces the narrow or blocked coronary arteries with bits of veins from other parts of the body.
What do plants make and how?
Plants make glucose, it is made by photosynthesis.
What is the movement of dissolved sugars from leaves to the rest of the plant called?
What does the xylem tissue carry?
Water and mineral ions from the soil around the plant to the stem and the leaves.
Why do all plant cells need sugar?
For respiration as well as for providing materials for growth.
Why does the plant need water?
To perform photosynthesis, (process in which carbon dioxide and water combine to make glucose, plus oxygen)
What does phloem consist of?
Columns of living cells.
What are the end of the cells in phloem called?
Water on the surface of spongy and palisade cells (inside the leaf) evaporates and diffuses out of the leaf. What is this called?