B2.2 Flashcards
Why do cells of multicellular organisms may differentiate and become adapted?
To perform a specific function
What are tissues
Aggregations of cells with similar structure and functions
What are organs
Organs are aggregations of tissues performing specific physiological functions
Why are organs organised into organ systems
To work together to form organisms
what do large multicellular organisms develop
Systems for exchanging materials
During the development of a multicellular organism…
Cells differentiate so that they can perform different functions
Examples of tissues
Muscular tissue
Glandular tissue
Epithelial tissue
What are organs made of
Tissues
What tissues are in the stomach
Muscular tissue
Glandular tissue
Epithelial tissue
Muscle tissue
Contracts to bring about movement
Glandular tissue
Produces substances such as enzymes and hormones
Epithelial tissue
Covers some parts of the body
How many tissues can an organ contain
Several tissues
What tissues does the stomach contain
Muscular
Glandular
Epithelial
What does the muscular tissue do in the stomach
Churn the contents
What does the glandular tissue do in the stomach
Produces digestive juices
What does the epithelial tissue do in the stomach
Covers the outside and inside of the stomach
What are organ systems
Groups of organs that perform a particular function
What is the digestive system an example of
A system in which humans and other mammals exchange substances with the environment
What does the digestive system include
Glands Stomach Liver Small intestine Large intestine
Glands
Such as the pancreas and salivary glands which produce digestive juices
Stomach
Where digestion occurs
Liver
Produces bile
Small intestine
Where absorption of soluble food occurs and digestion
Large intestine
Where water is absorbed from the undigested food producing faeces
Plant organs
Stem
Roots
Leaves
What is the mesophyll tissue
Where most of the photosynthesis occurs
