B3 - organisation and the digestive system Flashcards
what is a tissue
a group of cells with similar structure and function working together
what is an organ
collections of tissues
what tissues are involved in digestive organs
muscular tissue - churning food and digestive juices together
glandular tissue - produce digestive juices
epithelial tissue - covers inside and outside of organs
what does the pancreas do
makes hormones to control blood sugar
makes enzymes that digest food
what is an organ system
a group of organs that work together to perform a specific function
what does the small intestine do
absorb soluble food molecules into the blood
what does the large intestine do
absorb water from undigested food into your blood
what does the liver do (digestive system)
produces bile which helps digest lipids
what do carbohydrates do and what elements do they contain
provide fuel
carbon, hydrogen, oxygen
what are small carbohydrate units called
simple sugars
what are complex carbohydrates made up of
long chains of simple sugar units bonded together
what are some carbohydrate rich foods
bread, potatoes, rice and pasta
what do most carbohydrates get broken down into
glucose
what are lipids
fats and oils
the most efficient energy store in your body
what are proteins used for
building up cells and tissues
basis of all enzymes
what are proteins made up of
long chains of amino acids
how many amino acids are there
20
what functions do proteins act as
structural components of tissues
hormones like insulin
antibodies
enzymes
