Science 6th

Living things

Organisation of living things

How are living things organised?CELL

TISSUE

ORGAN

SYSTEM

Plan cells and animal cells

Plant cellRigid cell wallCytoplasmChloroplastsNucleus

Animal cellMembraneCytoplasmOrganellesNucleus

Unicellular microbes

Bacteria• Protist Kingdom.• Most are microscopic.• Spherical or rod-shaped.• Move in different ways, some with

flagella.• Reproduce by division.

Amoebae• Protist, algae, Fungi and Animal

Kingdoms.• Many are microscopic.• Move around by changing shape.• Reproduce by dividision.

Classification of animals

ARTHROPODS ·Jointed legs and exoskeleton ·Oviparous ·Lungs or gills

MOLLUSCS ·Soft bodies ·They often have a shell ·Oviparous ·Lungs or gills

ANNELIDS ·Soft, segmented bodies ·Oviparous or asexual reproduction (by buds)

ARTHROPODS·Jointed legs and exoskeleton·Oviparous·Lungs or gills

MOLLUSCS·Soft body ·Some have tentacles·Asexual reproduction (by buds)·Absorb oxygen through their skin

ECHINODERMS·Spiky bodies ·Some have tentacles·Oviparous·Lungs or gills

Nutrition in plants

RAW SAP

ELABORATED SAP

Water and nutrients from the soil

The plant takes in carbon dioxide and sunlight and converts raw sap into elaborated sap. This is called PHOTOSYNTHESIS.

The plant expels Oxygen and water vapour.

Raw sap travels through the stem to the leaves.

Reproduction in plantsSEED PLANTS

ANGIOSPERMS

GYMNOSPERMS

SEEDS IN FRUITSEEDS IN CONES

NON-SEED PLANTS

Produce spores

FERNS MOSSES

Food chainsA food chain involves organisms that have a trophic relationship to each other.

Plants are producers

Herbivores eat plants. They are primary

consumers

Omnivores and carnivores eat other

animals. They are secondary

consumers.

Bacteria, fungi and worms are decomposers. They transform plant and animals remains into nutrients

Classification of living things

UNICELLULAR MULTICELLULAR

Examples:·Bacteria·Amoebae·Algae

Fungi

Plants

Animals

Examples:·Mushrooms

Seed plants Non-seed plants

Examples:·Angiosperms·Gymnosperms

Examples:·Ferns·Mosses

Vertebrates Invertebrates

Examples:·Mammals·Fish·Birds·Reptiles·Amphibians

Examples:·Arthropods·Coelenterates·Echinoderms·Molluscs·Annelids·Porifera