Levels of Organization in Organisms Review Cells / Organization.

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Presentation transcript:

Levels of Organization in Organisms Review Cells / Organization

How cells are organized Different cells have different functions Eg: In Plants Type of cellsFunctionPicture Root Hair cells: Found on outside of plant roots/ above root tip Long/ thin reaching out into soil Help anchor the plant to the soil Absorb water mineral ions from soil Has large surface area so that lots of dissolved nutrients can get inside the cell quickly Xylem Cell: Empty / dead cell Cell wall fill with lignin – hardens / strong / waterproof / with cellulose 1 cell = xylem vessel element – no end walls end to end formation – forming long continuous tubing from roots to leaves (1) transport water / minerals from root to parts of plant (2) structural support to plant (lignin)

Animal cell function Type of cellsFunctionPicture Cilliated cells: Line the trachea (windpipe) and bronchi (tubing that leads into the lungs) Tiny extension of cells Can move rhythmically together Help sweep mucus up the bronchai / trachea where you can swallow it. Mucus traps bacteria / dirt particles from the air you breath and cillia helps keep it out of the lungs. Muscle Cells: In your arms / limbs Has many nuclei look striped / many strands of protein arranged in pattern. strands of protein allow muscles to contract (get longer and shorter) Red blood Cell: smallest cell No nucleus Red protein = hemoglobin Small size allows it to move through smallest spaces hemoglobin carries oxygen to all the cells Dent in the middle = more surface area – faster speed of oxygen moving in and out of cell

Annotated drawing

Tissue / organs / organ systems Tissue = a group of similar cells that all work together to perform the same function (muscles = tissue) Organ = a group of different tissues which work together to perform a particular function (heart = organ) Organ system = a group of organs with related functions working together to perform a body’s function ( circulatory system has the heart and the lungs brining oxygen to all the cells in the body)