organisation extra flashcards
organisation pyramind
organelle
cell
tissue
organ
organ system
organism
epithelial tissue
covers outside of body as well as internal organs
muscular tissue
contracts to bring about movement
e.g stomach muscular walls to churn food
function o mouth
site of mechanical digestion
food mixed with saliva which contains amylase - digestion of carbohydrates
glandular tissue
contains secretory cells that prodcue and release substances like enzymes and hormones
eg salivary glands producing amylase
pancreas
orgn that makes hormones to control blood sugar and produce enzymes for digestion
whats organ
lots of tissues working together to perform specific function
what is cell
smallest unit of any living thing
whats tissue
lotts of same type of cell working togethether
whast organism
livin thing
whats organ system
system of organs working together to perform specific funtion
peristalsis
food moved down digestive system by process - peristalsis
this is contraction of two seperate muscles in wall of oespoghagus and small int. contractions are wave like and create a squeezing action
once u have chewed ur food, it mixes w/ saliva and forms a bolus
organs in digestive system
oesophagus, stomach, small intestine, large intestine
functions of digesive system
digestion - breakdown of food so it is small n soluble enough to diffuse through walls of small int
absorption - transporting digested food molecules into blood
job stomach
digestion of protein
dangerous microogranginsm killed
adaptatios of stomach
bolus gets soaked in hydrochloric acid which kills bacteria and provides optimum ph for enzymes to work
walls secrete mucus to protect the stomach lining from HCL, enzymes to break down food molecules and acids to provide optimum ph for enzymes to work
muscles of stomach contract to churn food and so food mixes with gastric juices. also performs peristalsis to cause movement of food to small int
function salivary glands
produce saliva which mix with food
saliva has amylase - digests carbohydrates
job oesophagus
carries food and liquid from mouth to stomach
gall bladder job
stores bile
job liver
processes blood coming from small int
produces bile
small int (duodenum) job
digestion of food and abosrption
small int (ileum) job
digestion and absorption
large in (colon) job
abosrpoption water from undigested food , feces made
large int - rectum - job
reeives waste and stores them until it passes out of body