Organs in animals

Note by , created almost 6 years ago

Biology (Tissues, Organs and Organ Systems) Note on Organs in animals, created by lmg719 on 05/05/2013.

Eye 799
Pin 0
Balloon left 0
Created by lmg719 almost 6 years ago
Key Biology Definitions/Terms
Biology Unit 1a - GCSE - AQA
Exchange surfaces and breathing
A level Computing Quiz
Zacchaeus Snape
Using GoConqr to teach Maths
Sarah Egan
GCSE AQA Biology - Unit 2
James Jolliffe
The Circulatory System
Shane Buckley
Cell Structure
Luisa Mandacaru
GCSE Biology - Homeostasis and Classification Flashcards
Beth Coiley

Page 1

Multicellular organisms usually contain differentiated cells, adapted for specific functions. Tissues consist of groups of similar cells. Organs contain different tissues, working together to carry out particular functions.Organ systems contain different organs. The different organ systems work together in an organism.TissuesDuring the development of a multicellular organism, cells differentiate so that they can carry out different functions. Differentiation is the process by which a cell becomes a specialised type of cell.A tissue is a group of specialised cells that have a similar structure and function. The table shows some examples of tissues and their functions.

Muscular tissue   ---    Contracts, bringing about movementGlandular tissue   --- Produces substances such as enzymes and hormonesEpithelial tissue   ---Covers some areas of the body

OrgansOrgans are made of tissues. A particular organ may contain several different tissues. For example, the stomach is an organ that contains: Muscular tissue - to churn the food and other contents of the stomach Glandular tissue - to produce digestive juices including acid and enzymes Epithelial tissue - to cover the inner and outer surfaces of the stomach The stomach is one of the organs that form the digestive system. The stomach contains various tissues, and each tissue is made of a particular type of cell. In order of increasing size and complexity:cells → tissues → organ (the stomach) → organ system (the digestive system)

The digestive systemOrgan systems are groups of organs that carry out a particular function. The human body has several organ systems, including: The nervous system The respiratory system The reproductive system The digestive system The digestive system is an example of an organ system in which humans and other mammals exchange substances with the environment. The table shows its main tissues and organs, and their functions:Pancreas and salivary glands   ---   Produce digestive juicesStomach   ---   Digests foodLiver   ---   Produces bileSmall intestine   ---   Digest and absorb soluble foodLarge intestine   ---   Absorbs water from undigested food, producing faeces

Organs in animals


The Digestive System