Plot-8, Sector-23, Rohini,New Delhi-110085
Session 2024-2025
Name: ……………………… S.No: W7
Roll No. ____ WORKSHEET
Class: IX___Subject: Biology
Date: . .2024
Tissues
Let's understand various types of animal tissues:
1.Epithelial Tissues: Epithelial tissues are seen on the outer layer of a
body or organ surface. They form the outermost protective layer of most
of the animals.
Differentiate the epithelial tissues on the following basis:
BASIS Squamous Cuboidal Columnar Stratified
squamous
Shape cube like pillar like, different
and column like shapes
Struct hexagonal
ure multilayered
flat
Positi centre centre bottom centre
on of
nucleu
s
Locati found in forms the found in skin
on Found in cheek salivary lining of the
cells, glands, parts stomach and
alveoli(in of the eye, intestines
lungs) thyroid gland,
pancreas,
kidney tubules
Diagra
m
2. Nervous tissue:
The cells of nervous tissue are highly specialized and the cells of this
tissue are called nerve cells or neurons.
● Nervous tissue stimulates and transmits the stimulus(signals) very
rapidly from one place to another within the body.
● The ___BRAIN, SPINAL CORD AND NERVES_____
_______________________________________are composed of the nervous
tissue.
● A neuron consists of a _CELL BODY________ which comprises nucleus and
cytoplasm, from which long thin hair-like parts arise.
● The neuron has a single long part, called the _ _AXON____________,
which transmits the nerve impulse to body parts.
● The neuron has short, branched parts called
___DENDRITES___________________.
● Many nerve fibers combine together by connective tissue and form a
___NERVE_________________
● Nerve impulse enables animals to move rapidly in response to stimuli.
Q. Observe the given diagram and label part:
i) Where information is acquired.- DENDRITE
ii) Through which information travels as an electrical impulse.AXON
iii) Where this impulse must be converted into a chemical signal for onward
transmission. NERVE ENDING
HW: Q1. Draw a well labelled diagram of a neuron in NB.
3. Muscular Tissue: Muscular tissue consists of elongated cells, also called
muscle fibres. Main function of muscular tissues is to provide movement to
the body. Muscles contain special proteins called contractile proteins,
which contract and relax to cause movement.
Based on the given pictures, differentiate between three types of muscles
that comprises muscular tissue.
Basis Skeletal Muscle Cardiac Muscle Smooth Muscle
1. Shape H- shape Spindle in
shape
,
Cylindrical,
Tubular,
elongated
2. Number of Uninucleate Uninucleate
nuclei in a
cell
Multinucleate
(Multinucleate
/uninucleate)
3. Position Periphery (at one Centre Centre
of nuclei side)
4. Branching Branched Unbranched
(branched/unbr
anched) Unbranched
5. Striation Stripes present Stripes
s/stripes absent(unstriat
Stripes ed)
present(striated)
6. Location Attached to the Heart Around the
bones(arms, legs) organs like
stomach,
intestines,
eyes, around
the blood
vessels
7. Function movement of arms, Pumping of churning
legs the blood movement of
through heart stomach,
pupil(in eyes)
size changing,
contraction of
blood vessels
8. Voluntary Involuntary Involuntary
/Involuntary
Voluntary(in our
control)
9. Fatigue(t Yes NO Yes
iredness)
Attempt the following questions:
Q1. Differentiate the following activities on the basis of voluntary (V) or
involuntary (I V) muscles.
a) Jumping of frog- Voluntary
b) Pumping of the heart- Involuntary
c) Writing with hand- voluntary
d) Movement of chocolate in your intestine- involuntary
Q2. Muscles, which are immune to fatigue are :
a) unstriped muscles
b) cardiac muscles
c) jaw muscles
d) skeleton muscles
Q3. Identify the features of striated muscles.
a) Cylindrical, striped, skeletal and voluntary
b) Spindle, unbranched and uninucleated
c) Cylindrical, unstriped and without nucleus
d) Cylindrical, striped and branched
Q4. Name the longest cell in the body.__________NERVE CELL/NEURON_______________
CW : Draw well labelled diagrams of the three muscles.
