Scnc symp

On The Topic:TISSUES

On The Topic:TISSUES

Science Symposium

Science Symposium

Mon, Aug 26 / 2013

By:Mohammad YasirMohsin Hussain

Roll No. 28 Roll No. 34

TissuesTissues

The group of cells that are similar in shape and together are called Tissue.Tissues are broadly classified into two types:[1] Plant Tissue [2] Animal Tissue

TISSUE

Plant Tissue

Meristematic Tissue

Permanent Tissue

Animal Tissue

Plant TissuePlant Tissue

Meristematic TissueThe cells of this tissue are always dividing.PROPERTIES:1)The cells are small and metabolically very active.2)Have dense Cytoplasm and thin cell wall with prominent nucleus3)They don’t have vacuole.They are classified into three types:1)Apical Meristem2)Intercalary Meristem3)Lateral Meristem

DiagramsDiagrams

Permanent TissuePermanent Tissue

Permanent Tissue

Simple Permanent

Tissue

Complex Permanent

Tissue

Permanent TissueThe tissue formed after differentiation in Meristematic tissue is

called permanent tissue. It is of two types:1]Simple Permanent Tissue 2]Complex permanent tissue

Permanent TissuePermanent Tissue

Permanent Tissue

Complex Permanent

Tissue

Xylem Phloem

Simple Permanent

Tissue

Parenchyma Collenchyma Sclerenchyma

Simple Permanent TissueSimple Permanent Tissue

The permanent tissue which is made up of only one kind of cellsis called simple permanent tissue.It is of following types:1. Parenchyma- These are living cell with thin cell wall and are loosely packed with lots of intercellular spaces.2. Collenchyma- These are living cells. They have irregular thickening at their cell

wall and hence have less intercellular space.3. Sclerenchyma-These are dead cells with excessive thickening at their cell wall

hence have no intercellular spaces.

EpidermisEpidermis

Epidermis is the outermost layer of plant parts. It is usually made

up of a single layer of parenchyma cells.

Functionsi. It aids in protection against

parasites.ii. Small pores are present in the

epidermis of leaves and are called stomata. They are necessary for exchange of gases.

iii. Epidermal cells of root increase the absorptive surface area.

iv. In desert plants, epidermis has a thick waxy coating of Cutin to prevent transpiration.

CorkCork

A layer of lateral meristem replaces the epidermis of stem.Cells on the outside are cut off from this layer. This forms the several layer thick

cork of the tree. Its cells are arranged compactly with no intercellular spaces.

Complex Permanent TissueComplex Permanent Tissue

The tissue made up of more than one type of cells is called Complex Permanent Tissue. Its types are:1] Xylem2] Phloem

XylemXylem

This tissue is responsible for the conduction of water and minerals

from root to various plant parts.It consists of following elements:

i. Tracheid ii. Vessels- they are tubular structure

iii. Xylem parenchyma- it stores food and conducts water sideways

iv. Xylem Fibres- they are mainly supportive in function

PhloemPhloem

This tissue is responsible for the conduction of food from leaves tovarious plant parts.

It consists of following elements:i. Sieve cellii. Companion celliii. Phloem Parenchymaiv. Phloem fibre

Diagrams

Animal TissueAnimal Tissue

Animal Tissue

Epithelial Tissue

Connective Tissue

Muscular Tissue

Nervous Tissue

Epithelial TissueEpithelial Tissue

This tissue forms the covering of most internal organs and cavities within the body. They are generally single layer arranged on a basement membrane. Depending upon the shape of cells, theyare of following types1. Squamous2. Cuboidal3. Columnar4. Ciliated Columnar5. Glandular6. Stratified

Connective TissueConnective Tissue

Blood:The liquid part of blood is called plasma. It is 90% water, contains Various ions, hormones, digested food and waste materialsThe cellular part contains RBC(Red Blood Cells)-contains red pigment Called Haemoglobin, WBC(White Blood Cells)-fight against diseases and Blood

Platelets-responsible for clotting.

Bones and CartilageTendon and LigamentAreolar and Adipose

MusclesMusclesS.No.

Striated Non-Striated Cardiac

1

2

3

4

Muscle cells have alternate dark and light bands called Striations.

Cells are unbranched, multi-nucleated with blunt ends.

They are voluntary muscle.

They are found in skeleton.

Muscle cells do not have any striations.

Cells are unbranched, uninucleated with tapering ends.

They are involuntary muscle.

They are found only in heart.

Striations are prominent but not very prominent.

Cells are uninucleated with blunt ends.

They are involuntary muscle

They are found in all internal organs except heart.

Diagrams

Science Symposium

Science Symposium

Thank YouThank You

Mon, Aug 26 / 2013

Science ActivityFormative Assessment-II