Tissues, Organs And Organ Systems Flashcards
What are specialised cells
Adapted cells that have differentiated for specific functions.
Define tissue
Arregations of similar cells
Define organ
Arregations of tissues performing specific physiological functions.
What is an organ system?
Groups of organs working together to form organisms.
Three examples of tissues
Muscular, glandular and epithelial.
Muscular tissue is for
Movement via contraction and relaxation of limbs.
Glandular tissue is for
secreting substances such as enzymes to enable chemical reactions and hormones to control certain functional features of an organism.
Epithelial tissue is for
Covering certain parts of the body(skin).
Tissue in the stomach
Muscular(churn contents and break up food), glandular(produce digestive juices) and epithelial(cover the outside and inside of stomach).
What does the digestive system do?
Enzymes breakdown food into soluble products we can absorb from the digestive system.
Name three insoluble molecules
Proteins,starch and carbohydrates.
Name three soluble molecules
Amino acids, sugars and fatty acids.
Name three enzymes responsible for the breakdown of large molecules.
Protease enzymes.
Carbohydrase enzymes.
Lipase enzymes.
What does protease convert molecules into?
Amino acids.
What does carbohydrase convert molecules into?
Sugars.
What does lipase convert molecules into?
Fatty acids and glycerol.
Organs involved in the digestive system
The mouth. The oesophagus. The stomach. The liver. The gall bladder. The pancreas. The small intestine. The large intestine.
The salivary glands produce
Amylase which can breakdown carbohydrates.
The oesophagus helps digestion by
Moving the food along.
The stomachs role in digestion is…
To churn up food and break it down into smaller molecules. It produces the acid which the enzyme pepsin works best in.
The livers role in digestion is to produce
Bile which neutralises the stomach acid and emulsify oils/fats.
The gall bladders role in digestion…
Stores bile.
The pancreas role in digestion
Produces digestive juices containing the enzymes protease, amalayse and lipase which are released into the small intestine.
The small intestines role in digestion
Absorption of soluble food into the bloodstream occurs here.