B2.2 Tissues, organs and organ systems


B2.2 Tissues, organs and organ systems

Animal organs

Tissue- A group of cells with similar structure and functions

Muscular tissue- Contracts to bring about movement 

Glandular tissue- Produces substances like hormones and enzymes

Epithelial tissue- Covers parts of the body 

Organ- made of tissues or several tissues. An example is the stomach which contains:

Muscular tissue- Churns the contents

Glandular tissue- Produces digestive juices

Epithelial tissue- Covers the outside and inside of the stomach protecting from the strong stomach acid

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B2.2 Tissues, organs and organ systems

Plant organs

Plant organs include stems, leaves and roots.

Examples of plant tissues are:

Epidermal tissues- Covers the plant

Mesophyll- Carries out photosynthesis

Xylem and phloem- Transports substances around the plant

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B2.2 Tissues, organs and organ systems

Organ Systems- Groups of organs that perform a particular function. The digestive systems includes:

Glands- e.g. pancreas or salivary glands which produce digestive juices

Stomach and small intestine- Where digestion occurs

The liver- Produces bile

The small intestine- Where absorption of soluble food occurs

The large intestine- Where water is absorbed from the undigested food, producing faeces 

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