B.3cell organisation and role of enzymes Flashcards
What is a tissue?
A group of cells with similar structure and function
What is an organ?
An aggregation of tissues that perform a specific function
What is an organ system?
Different organs working together
state the different tissues that the stomach contains
-muscular tissue, to churn the food and digestive juices of the stomach together
-glandular tissue, produce digestive juices that break down
-epithelial tissue, covers the inside and outside of the organ
whats the function of a liver
producing bile
function of a stomach
break down large insoluble molecules** into smaller **soluble molecules and absorption
function of a small intestine
break down large insoluble molecules into smaller soluble molecules and absorption
function of large intestine
absorbs water from undigested food
explain the difference between organs and organ systems
an organ is a collection of tissues whereas
-organ system is a group of organs that work together
whats the digestive system
a group of organs that work together to digest and absorb food
-a muscular tube that squeezes food through it starts at one end with your mouth and finishes with your anus
where are the main places where food is digested
stomach
small intestine
what make up the structure of a cell and what are they made up of
carbohydrates, lipids and protein
often made up by smaller molecules joined together as part of the cell metabolism
carbohydrates provide us…
with fuel, energy
contain
-carbon
-hydrogen
-oxygen
an example of complex carbohydrates
starch
cellulose
-made up of long chains of simple sugar units bonded together
