Tissues

Front 1

What is a tissue?

Back 1

A collection of specialized cells working together with a specific function or set of functions.

Front 2

How is squamous epithelial tissue adapted to its function?

Back 2

• Very thin (only one cell thick).
• Allows rapid diffusion in the lung lining.

Front 3

Give the two cell types present in ciliated epithelial tissue and their functions.

Back 3

1. Ciliated epithelial cells have hair-like cilia on one surface which beat rhythmically (e.g. in the trachea to sweep particles away from the lungs).
2. Goblet cells secrete mucus to trap foreign particles like dust and bacteria, preventing them from reacting the alveoli.

Front 4

Describe the structure of cartilage.

Back 4

• Contains elastin and collagen protein fibres.
• Composed of chondrocyte cells embedded in an extracellular matrix containing elastin.

Front 5

Give three characteristics of the epidermis in plants.

Back 5

• A single layer of closely packed cells.
• Usually covered with a waterproof waxy cuticle.
• Has embedded stomata which open to allow gas exchange and close to prevent water loss.

Front 6

Describe the structure of xylem tissue

Back 6

• Composed of elongated dead cells called vessel elements.
• Vessel elements are strengthened by lignin.
• Provides the plant with structural support.

Front 7

Describe the structure of phloem tissue

Back 7

Composed of columns of sieve tube cells separated by perforated walls called sieve plates.