organsing animals and plants Flashcards
the blood,the blood vessels the heart,helping the heart
What are the 4 main components of blood?
- red blood cells
- white blood cells
- platelets
- plasma
What do red blood cells contain?
haemoglobin binds to oxygen to transport it from the lungs to the tissues.
What do platelets do?
cell fragements that start the clotting process at wound size
What do the white blood cells do?
help to protect the body against infection.
What are the 3 main types of blood vessels that blood is carried around from?
-arteries
- veins
- capillaries
What do our arteries do?
carry blood away from our heart to the organs of your body
What do our veins do?
carry blood away from the organs towards your heart.
What do the capillaries do?
enables substances to diffuse easily out of your blood and into your cells
What do valves do?
prevent backflow and ensure that blood flows in the right direction.
Why do humans have a double curcularatory system?
one system carries blood from your heart to your lungs.
the other transport system carries blood from your heart to all the other organs in your body.
What does the heart do?
organ that pumps blood around the body
What can stents be used to do?
used to keep narrowed or blocked arteries open
What do statins do?
reduce cholestrol levels in the blood and recuce the ridk of coronary heart disease
What are artificial pacemakers?
eletrical devices used to correct irregularaties in the heart rhythm.
What are artificila hearts?
devicethat that is,
used to keep patients alive while they wait for a transplant
OR
for their heart to rest as am aid to recovery
What is a mechanical valve?
made from carbon and metal to control the normal flow of blood into and out of the heart.
what is an animal valve?
composed from animal or human tissue to help thin blood vessles
cons of mechanical valves?
- ## increased risk of blood clots (lead to heartattack)
cons of animal valves?
- bleeding side effects of warafarin
Why is the left side of the heart thicker?
works at a higher pressure and pumps blood to the whole body
What does the pholem tissues do?
pholem tissue transports dissolved sugars from the leave to the rest of the plant.
What do the xylem tissues do?
transports water and mineral ions from the roots to the stem and leaves.
What are plant tissues?
collections of cells specialised to carry out specific functions.
What is the gas exchange system?
absorbing oxygen into the blood and removing carbon dioxide from the blood.
