Life processes and cell activity

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Information about Life processes and cell activity

Published on May 20, 2012

Author: sanahxo



Explain the importance of life processes, explain the nucleus and other jobs in a cell. explains key features of specialised cells and importance of plant organs.

Life Processes and CellsLo –to be able to learn all the featuresof a plant cell.- To be able to understand the seven lifeprocesses.

The seven life processes!Moving parts of the body.Producing offsprings.Responding and reacting.Getting food to stay alive.Getting rid of waste.Turning food into energy.Growing to adult size.

Both animal and plant cells have -

Animal and plant cell!Nucleus – controls the cell and contains allthe genetic information.Cell membrane – the lining of the cell andit controls what goes in and out of thecell.Cytoplasm – where all the chemicalreaction take place.

Plant cell!Cell wall – supports the cell.Vacuole – a large space filled with cellsap – a weak solution of salts and sugar.Chloroplasts- contains chlorophyll thatis needed for photosynthesis.

Specialised cellsLo - To identify each specialised cell. - To be able to learn the explanations

All cells are adaptedto do a particularjob. This is calledCELL SPECIALISM.

Sperm cell!• The sperm cell is very small, it has a little tail to which provides movement so that it can find the egg to fertilise.• Its head contains enzymes that are used to break through the egg membrane so that that two nuclei can join.• It also contains chromosomes in the nucleus that holds genetic information from the father that will get passed down on to the offspring.

Ovum/egg cell!• It has a large and bulky shape because there is no need for active movement .• It has a yolk that provides a large food store for the young organism when fertilised.• It also contains chromosomes in the nucleus that holds genetic information from the mother that will get passed down on to the offspring.

Palisade cell!• Large surface area and found on the top side of the leaf – ideal for absorbing CO and light• They’re packed with chloroplast which contain green pigment chlorophyll- needed for photosynthesis.DESIGNED FOR PHOTOSYNTHESIS!

Root hair Cell!• The long root hair cell increases the surface area which helps the absorption of water and minerals.• Thin cell wall that allows minerals to pass through.DESIGNED FOR ABSORBING!

Cilia cell!• Cilia cells line all the air passages in your lungs.• They have tiny hairs that filter the air as it filters through.• The hairs sweep mucus with trapped dust.DESIGNED TO STOP LUNG DAMAGE!

Cells, tissues, organs and organ system• A group of similar cells come together to make a TISSUE.• A group of different tissues work together to make an ORGAN.• A group of organs work together to make an ORGAN SYSTEM.(E.G – root hair cells make up a root tissue , which makes up a root ‘organ’ system, which then works with other systems to make a plant.)

Plant Organs!LO -to identify key features of a plant -To learn what each one is for.

The Plant!Four main plant organs allow the life processes to take place. Flower Leaf Stem Root

Plant Organ - Flower•The flower contains theorgans for reproduction.•It attracts insects to carry thepollen between plants to allowpollination.

Plant Organ - Stem•The stem hold the leaves uprightand facing the light.•It carries water and minerals tothe leaves, and food around theplant.•The stem is important fornutrition, excretion and growth.

Plant Organ – Root• The roots provide an anchorage for the plant – so that it doesn’t fall over or blow away.• With its root hair it provide a big surface area to help take in water and minerals – these are both essential for photosynthesis.• The roots are vital for nutrition.

Plant Organs – Leaves• The leaves are important for photosynthesis, they make all the food for the plant.• Leaves contain chloroplast that use light energy to change CO2 into glucose.• They have tiny little pores that allow essential CO in and waste gases out – ( they have no lungs)• They leaves are important for nutrition and excretion.

•Every cell in the plant will respire and change glucose into useful energy. jssssss

And that’s theend of this topic! Welldone! 

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