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yr 8 cells revision

year 8 cells revision

TermDefinition
cell membrane boundary for the cell, controls which substances pass in and out
cell wall provides protection and strength for the cell
nucleus contains DNA, which controls the cell's activities
cytoplasm a jelly-like substance that the organelles float in
mitochondria the powerhouse of the cell that releases energy from food
vacuole stores fluids, nutrients and wastes
chloroplast collects sunlight to convert water and carbon dioxide into sugar
difference between plant and animal cells plant cells have a cell wall and chloroplasts
multicellular made of more than one cell
unicellular made of one cell
seven characteristics of living things movement, respiration, sensitivity, growth, reproduction, excretion, nutrition
cells definition the building blocks of life
levels of organisation cells to tissue to organ to organ system to organism
unicellular examples bacteria, protists and algae
multicellular examples plants and animals
prokaryote have no membrane bound organelles
eukaryote contain membrane bound organelles
prokaryote examples e coli and salmonella
eukaryote examples human, tree, phytoplankton
microscope magnification eye piece x objective lens
specialised cells cells that work together to perform all the functions needed for life
vital functions needed in cells provide structure and support, facilitate growth, allow for transport, produce energy, create metabolic reactions, aid in reproduction
muscular skeletal system definition provides structure, support and protection of organs
muscular skeletal system parts bones, muscles and joints
circulatory system definition delivers oxygen and nutrients to cells and takes away wastes
circulatory system parts heart, blood and blood vessels
digestive system definition breaks down food and absorbs nutrients
digestive system parts mouth, oesophagus, stomach, small intestine, large intestine, and anus
respiratory system definition takes in oxygen and expels carbon dioxide
respiratory system parts nose, mouth, throat, voice box, windpipe, lungs and diaphragm
excretory system definition removes wastes from the body
excretory system parts kidney, ureter, urinary bladder and urethra
eye piece the part you look through with your eye, 10x magnification
neck used to safely hold the microscope
stage where the slides are placed
coarse focus knob used to make large changes in focus
fine focus knob used to make small changes in focus
base used to safely transport the microscope
rotating nose piece allows for change of objective lenses
low power objective lens 4x
medium power objective lens 10x
high power objective lens 40x
stage clips used to keep the slide in place
diaphragm used to vary the amount of light passing through the slide
light source sends light up through the diaphragm
photosynthesis the conversion of carbon dioxide and light energy to chemical energy and oxygen
endocrine system definition releases and manages hormones
lymphatic system definition carry lymph and white blood cells
lymphatic system parts bone marrow, spleen, thymus, lymph nodes, and lymphatic vessels
nervous system definition sends messages from the brain to the body
nervous system parts brain, spinal cord, nerves
reproductive system definition to produce egg and sperm cells
reproductive system parts uterus, ovaries and testes
endocrine system parts glands, ovaries and testes
muscle cell A cell that changes shape by contracting
fat cell A cell that stores excess energy from food
intestinal lining cell A cell with finger-like structures that help it absorb water
neuron A cell that sends signals in the brain or through nerves
red blood cell Cells that contain haemoglobin that helps carry oxygen
white blood cell A cell that helps to protect the body from infection
Created by: justineforrest
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