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Understanding the Physiology of Health and Illness

Cell specialisation and the four tissue types

  • 3 things to know
  • AS 7

Overview

Cell specialisation, four main types of tissue in the human body and main job of epithelial tissue.

What you need to know

Answer each one before you reveal it.

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Key term

What is meant by cell specialisation?

Key term

Define a tissue.

Key term

Name the four main types of tissue in the human body.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is meant by cell specialisation?

    Model answer

    Cell specialisation is the process by which a cell develops a structure suited to one particular job.

  2. 2

    Define a tissue.

    Model answer

    A tissue is a group of similar cells working together to carry out a particular function.

  3. 3

    Name the four main types of tissue in the human body.

    Model answer

    The four main tissue types are epithelial tissue, connective tissue, muscle tissue and nervous tissue.

  4. 4

    What is the main job of epithelial tissue?

    Model answer

    Epithelial tissue covers body surfaces and lines cavities, tubes and glands, protecting the structures beneath and controlling what passes through.

  5. 5

    Where would you find ciliated epithelium, and why is it there?

    Model answer

    Ciliated epithelium lines the airways, where the hair-like cilia sweep mucus and trapped dust up and away from the lungs.

  6. 6

    Why is the epithelium lining the small intestine only one cell thick?

    Model answer

    A lining one cell thick keeps the distance short for digested food to cross into the blood, so absorption is rapid.

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