Y11 Mock Organisation Flashcards
what are cells
the basic building blocks of all living organisms
what is tissue
a group of cells with a similar structure and function
what is an organ
a combination of tissues carrying out a specific function
what is an organ system
organs work together within an organ system
what is an organism
organs working together
how does the heart pump blood around the body
in a double circulatory system
what does the right ventricle do
pumps deoxygenated blood to the lungs to take in oxygen
what does the left ventricle do
pumps oxygenated blood around the rest of the body
what do valves do
make sure the blood flows in the right direction and prevent backflow
process of pumping blood steps
blood flows into the two atria from the vena cava and pulmonary vein
atria contract pushing blood into the ventricles
the ventricles contract forcing blood into the pulmonary artery and the aorta and out of the heart
the blood then flows to the organs through arteries and returns through veins
the atria fill again and cycle restarts
what do arteries do
carry blood away from the heart
what do capillaries do
involved in the exchange of materials at the tissue
what do veins do
carry blood to the heart
features of arteries
pump blood at high pressure
strong elastic walls
thick walls compared to lumen
features of capillaries
tiny
carry blood close to every cell
permeable walls
supply food and oxygen and take away co2
one cell thick walls
