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BIO - 2.1.6 Cell Division > Organisation of cells > Flashcards

Flashcards in Organisation of cells Deck (5)
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1

Tissue

- A tissue is made up of a collection of differentiated cells that have a specialised function or functions.
- So, each tissue is adapted for a particular function within the organism.

2

Categories of tissues in animals

- Nervous tissue: adapted to support transmission of electrical impulses
- Epithelial tissue: adapted to cover body surfaces, internal and external.
- Muscle tissue: adapted to contract.
- Connective tissue: adapted either to hold tissues together or as a transport medium.

3

Categories of tissues in plants

- Epidermis tissue: adapted to cover plant surfaces.
- Vascular tissue: adapted for transport of water and nutrients.

4

Organs

- An organ is a collection of tissues that are adapted to perform a particular function in an organism.
- Large multicellular organisms have coordinated organ systems.
- Each organ system is composed of a number of organs working together to carry out a major function in the body.

5

Organ systems in animals

- Digestive systems: takes in food, breaks down large insoluble molecules into small soluble ones, absorbs nutrients into blood, retains water needed for body and removes undigested material.
- Cardiovascular system: moves blood around the body to provide an effective transport system for the substances it carries.
- Gaseous exchange system: brings air into body so oxygen can be extracted for respiration and co2 can be expelled.