B3.1 - Organisation And The Digestive System (Finished) Flashcards
What is a tissue?
A group of specialised cells with similar structure and functions that work together to perform a particular function
What is an organ?
An organ is a group of tissues that work together to perform a particular function
What are cells?
Cells are the basic building blocks that make up all living organisms
What is an organ system?
An organ system is a group of organs working together to perform a particular function
In what steps do cells become organisms?
Cell –> tissue –> organ –> organ system –> organism
What are three of the tissues the stomach contains?
- Muscular tissue
- Glandular tissue
- Epithelial tissue
Use the digestive system stomach and small intestine as an example to show how different organs depend on each other in an organ system
Unless food has been broken up into smaller pieces by the stomach’s churning motion and enzymes it is in too big chunks for the small intestine to absorb
Which 2 roles does the pancreas have?
- Makes hormones to control blood sugar
- Makes enzymes for digestion
Give some adaptions of the stomach to help with digestion
- Hydrochloric acid to kill off most pathogens
- Glandular tissue to produce the digestive juices needed to break down food
- Folded up to begin with but unfolds to increase capacity
- Muscles at entrance and exit of stomach to control food going in and out
- Muscular tissue to churn food and digestive juices together
What is the name of the protein which is responsible for ensuring elasticity in muscle?
Titin
What is epithelial tissue for?
Covering the inside and outside of the organ
What are the roles of muscular and glandular tissues in the stomach?
Muscular - Churn the food and digestive juices of the stomach together
Glandular - Produce the digestive juices used to break down food
