BIOLOGY Practical 3,7,8,9 Flashcards
independent varible
the varible that you change in an experiment
dependent varible
the varible that you measure as you collect results
osmosis
the net movement of water molecules down the concentration gradient through a particaly permeable membrane
diffusion
net movement of particles down the concentration gradient as a result of random movement
active transport
movement of molecules from a lower concentration to a higher concentration by using energy
xylem
a plant tissue made up of dead, empty cells joined end to end. transports water and mineral ions to help support the plant
phloem
a plant tissue made up of living cells joined end to end, transports substances made by the plant like sucrose and amino acids
lignin
hard strong waterproof substance forms walls of xylem cells
what part does water vapor leave the plant from
Stoma
what are the befits of humans having a double circulatory
it pressurizes the blood more than a single circulatory sytem meaning it can travel farther
water potential gradient
a difference in water potentail between 2 areas
transpiration
loss of water vapor from leaves
transpiration pull
a force produced by the loss of water vapor from a leaf,which reduces the pressure at the top of xylem vessels
pulmonary veins
the veins that carry oxygenated blood from the lungs to the left atreum of the heart
atria
the thin-walled chambers at the top of the heart wich receive blood
ventricles
the thick walled chambers at the base of the heart which pump out blood
septum
structure that separates left and right side of the heart
venae cavae
the large veins bring deoxygenated to the right atrium
aorta
the largest artery receives oxygenated blood from the left ventricle and delivers it to the body organs
pulmonary arterys
the artery that carries deoxygenated blood from the right ventricle to the lungs
what does LORD stand for
left oxygenated right deoxygenated
Coronary arteries
vessels that deliver oxygenated blood to the heart muscle
artery
thick-walled vessel that takes high pressure blood away from the heart
capillary
tiny vessel with walls only one cell thick that takes blood close to body cells
vein
thin walled vessel that takes low pressure blood back to heart
plasma
liquid part of blood
red blood cells
biconcave blood cells with no nucleus which transport oxygen
white blood cells
blood cells with a nucleus which help to defend agains t pathogens
platelets
tiny cell fragments present in blood which help with clotting
phagocytosis
taking bacteria or other small structres into a cells cytoplasim and digesting them with enzimes
phagocytes
white blood cells that destroy pathogens by phagocytosis
lymphocytes
white blood cells that secrete antibodies
