BiologyICSE Class 9 · Tissues

Animal Tissues: Epithelial, Connective, Muscular and Nervous (ICSE Class 9 Biology)

Updated 17 October 2026 · Fact-checked

Animals have four basic tissues: epithelial tissue covers and lines surfaces; connective tissue binds, supports and transports; muscular tissue contracts to cause movement; nervous tissue carries messages as nerve impulses.

Match each tissue's cell arrangement to its job: packed cells cover, spaced cells in matrix support, long fibres contract, neurons carry impulses.

Illustration drawn for QuestionBuddy.

Understand Animal Tissues: Epithelial, Connective, Muscular and Nervous

1. Epithelial tissue. Closely packed cells with very little matrix, resting on a basement membrane; it covers the body and lines organs.

*Squamous* (flat): lining of the mouth and alveoli; skin (stratified).
*Cuboidal*: cube shaped, in kidney tubules and glands; secretion and absorption.
*Columnar*: tall cells in the lining of the stomach and intestine; secretion and absorption.
*Ciliated*: has cilia in the windpipe to push mucus.

Functions: protection, absorption, secretion, filtration.

2. Connective tissue. Cells scattered in a large amount of matrix; it joins, supports and transports.

*Areolar*: loose, fills spaces between organs.
*Adipose*: stores fat.
*Tendon and ligament*: tendons join muscle to bone; ligaments join bone to bone.
*Cartilage*: firm and flexible, as in the ear and nose tip.
*Bone*: hard matrix of calcium and phosphorus salts.
*Blood*: fluid matrix (plasma) with red cells, white cells and platelets; transports.

3. Muscular tissue. Long contractile cells.

*Striated (skeletal)*: voluntary, attached to bones.
*Smooth (unstriated)*: involuntary, in walls of the stomach, intestine and blood vessels.
*Cardiac*: involuntary, striated, in the heart; never tires.

4. Nervous tissue. Made of neurons with a cell body, dendrites and an axon; carries impulses and co-ordinates the body.

Animal Tissues: Epithelial, Connective, Muscular and Nervous: key facts

Epithelial: $S q u am o u s : f l a t ∣ C u b o i d a l : c u b e ∣ C o l u mna r : t a l l ∣ C i l ia t e d : c i l ia$
Connective: Areolar
Adipose
Tendon: muscle to bone
Ligament: bone to bone
Cartilage
Bone
Blood
Muscular: $S t r ia t e d : v o l u n t a r y ∣ S m oo t h : in v o l u n t a r y ∣ C a r d ia c : in v o l u n t a r y, h e a r t$
Nervous: Neuron
Cell body
Dendrites
Axon
Impulse

Animal Tissues: Epithelial, Connective, Muscular and Nervous in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

The postal system

Suppose a letter must be carried from one house to another by a network of postmen and sorting offices.

Which tissue is like this network?

Try it first, then show the solutionSolution

Neurons carry messages as impulses.
The nerve fibres are the delivery lines.

Answer: Nervous tissue.

Memory hook: Neurons are the postmen.

Tricks to remember Animal Tissues: Epithelial, Connective, Muscular and Nervous

Short memory aids. Say each one aloud once, then use it on a question the same day.

Tendon = Take to bone
Tendon joins muscle to bone; ligament links bone to bone.
Use it when: Tendon versus ligament.
CEMN
Connective, Epithelial, Muscular, Nervous: the four.
Use it when: List.

Animal Tissues: Epithelial, Connective, Muscular and Nervous: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Tendon and ligament · 2 marks · Short answerBoard level

Distinguish between a tendon and a ligament. [2]

Try it first, then show the solutionSolution

A tendon joins muscle to bone.
A ligament joins bone to bone.

Answer: Tendon: muscle to bone. Ligament: bone to bone.

Example 2: Epithelial types · 3 marks · Short answerBoard level

Name the epithelial tissue found in (a) the lining of the stomach, (b) the windpipe, (c) the air sacs of the lungs. [3]

Try it first, then show the solutionSolution

(a) Columnar.
(b) Ciliated.
(c) Squamous.

Answer: (a) Columnar (b) Ciliated (c) Squamous.

Example 3: Muscle comparison · 3 marks · Short answerHarder board level

Compare skeletal, smooth and cardiac muscle on control, striations and location. [3]

Try it first, then show the solutionSolution

Skeletal: voluntary, striated, attached to bones.
Smooth: involuntary, unstriated, in walls of hollow organs.
Cardiac: involuntary, striated, in the heart.

Answer: Skeletal voluntary and striated; smooth involuntary and unstriated; cardiac involuntary and striated in the heart.

Example 4: Blood as tissue · 3 marks · Short answerHarder board level

Why is blood classed as a connective tissue although it is a fluid? [3]

Try it first, then show the solutionSolution

Blood has cells in a matrix (plasma).
It connects different parts of the body by carrying materials.
It has a common mesodermal origin with other connective tissues.

Answer: Cells in a fluid matrix that links organs by transport.

Example 5: Case: runner injury · 4 marks · Case-basedHOTS / competency

Case. A runner tears the cord joining the calf muscle to the heel bone. (i) Name the tissue. [1] (ii) Name its type. [1] (iii) Why does it heal slowly? [2]

Try it first, then show the solutionSolution

(i) Tendon (connective tissue).
(ii) Dense connective tissue.
(iii) It has a poor blood supply and few cells.

Answer: (i) Tendon (ii) Connective tissue (iii) Poor blood supply and few cells.

Where students lose marks in Animal Tissues: Epithelial, Connective, Muscular and Nervous

The slips examiners see most often, and what to write instead.

Mistake: Writing that ligament joins muscle to bone
Tendon and ligament are swapped.
Do this: Tendon muscle-bone; ligament bone-bone.
Usually costs: 1 mark.
Mistake: Calling cardiac muscle voluntary
It is involuntary.
Do this: State involuntary and striated.
Usually costs: 1 mark.
Mistake: Writing blood only as a fluid
Cells are ignored.
Do this: Mention plasma, cells and platelets.
Usually costs: 1 mark.

Exam tips

Draw a neuron with labels: cell body, dendrites, axon.
Match each epithelial type with one location.
Compare muscles in a table.
Mention matrix for connective tissue.

Practice questions on Animal Tissues: Epithelial, Connective, Muscular and Nervous

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
Which muscle never gets tired?
(a) Skeletal
(b) Smooth
(c) Cardiac
(d) None
Hint
Heart.
Answer
(c) Cardiac.
Q2 · 1 mark · Very short answerBoard level
Name the tissue that stores fat. [1]
Hint
Adipose.
Answer
Adipose tissue.
Q3 · 2 marks · Very short answerBoard level
State two functions of epithelial tissue. [2]
Hint
Cover.
Answer
Protection and absorption (also secretion).
Q4 · 1 mark · Assertion-reasonHarder board level
Assertion (A): Nervous tissue co-ordinates body activities.
Reason (R): Neurons carry impulses.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Hint
Impulse.
Answer
(a).
Q5 · 3 marks · Short answerHarder board level
Describe the structure of a neuron. [3]
Hint
Cell body.
Answer
A neuron has a cell body with a nucleus, short branched dendrites that receive impulses and a long axon that carries them away.
Q6 · 2 marks · Very short answerHarder board level
Why does cartilage not heal as quickly as bone? [2]
Hint
Blood vessels.
Answer
Cartilage has no direct blood supply, whereas bone is well supplied.
Q7 · 3 marks · Short answerHarder board level
Relate the shape of the cells to the work done in the intestine lining and in the lining of the lung air sacs. [3]
Hint
Function.
Answer
Columnar cells are tall and secrete and absorb; squamous cells are thin and allow quick gas exchange.
Q8 · 2 marks · Very short answerHarder board level
Why are smooth muscles called involuntary? Give two places where they occur. [2]
Hint
Not under will.
Answer
They are not controlled by will; they occur in the stomach wall and blood vessels.
Q9 · 3 marks · Case-basedHOTS / competency
Case. A patient has a disease in which the tissue joining bones at joints becomes weak. Name that tissue and explain what could happen to the movement of the joint. [3]
Hint
Ligament.
Answer
Ligaments hold bones together; if weak, the joint becomes unstable and may dislocate.
Q10 · 4 marks · Case-basedHOTS / competency
Case. A student finds a tissue with long, unbranched, spindle-shaped cells with one nucleus, found in the wall of the intestine. (i) Name it. [1] (ii) State its control. [1] (iii) Give one function. [2]
Hint
Spindle.
Answer
(i) Smooth muscle. (ii) Involuntary. (iii) It moves food along the gut by peristalsis.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Tissue that joins bone to bone?Show answer
Ligament.
2.Types of muscle?Show answer
Striated, smooth and cardiac.
3.Cell of the nervous system?Show answer
Neuron.
4.Tissue that covers surfaces?Show answer
Epithelial.
5.Fat storing tissue?Show answer
Adipose.

Animal Tissues: Epithelial, Connective, Muscular and Nervous: frequently asked questions

Is bone a connective tissue?

Yes, with a hard calcified matrix.

What is matrix?

The non-living material between cells.

Where is ciliated epithelium found?

In the windpipe.