Cells, Tissues & Organs
- Created by: jwizz
- Created on: 02-06-16 16:35
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- Cells, Tissues & Organs
- Animal and plant cells
- light & electron microscopes
- Animal cells
- nucleus
- controls activities of the cell
- contains the genes on chorosomes
- carries instruction for making new cells/organisms
- Cytoplasm
- liquid gel where chemical reactions for life take place
- cell membrane
- controls what goes in and out
- mitochondria
- where respirations occurs
- Ribosomes
- where proten synthesis takes place
- nucleus
- plant cells
- cell wall made of cellulose to support it
- chloroplasts containing chlorophyll to photosynthesise
- permanent valuole to keep it rigid
- Bacteria and Yeast
- you can see bacteria colony with your eye. cultured on an agar plate
- Bacteria cell
- flagella
- plasmids and loose genetic material
- cell wall and membrane
- slime capsule
- cytoplasm
- yoghurt, cheese, sewage treatment, medicines
- Yeast cell
- nucleus, cell wall, cytoplasm, cell membrane
- bigger than bacteria
- reproduces by asexual budding
- form a bud on the yeast then forms a separate organism
- when anaerobic respiration breaks down sugar into ethanol and CO2
- ethanol = alcohol.
- fermentation
- Specialised cells
- specialised: adapted for a particular function
- Fat cells
- little cytoplasm, lots of fat
- few mitochondria
- can expand to 1000 times original size
- Cone cells from human eye
- visual pigment
- lots of mitochondria to reform visual pigment
- synapse to optic nerve
- Root hair cells
- large SA
- permanent vacuole to speed up osmosis
- large SA
- Sperm cells
- long tail to help it move
- lot of mitochondria
- acrosome with digestive enzymes
- large nucleus
- Diffusion
- movement of particles from an area of high to low concentration along a concentration gradient
- diffusion occurs down a concentration gradient
- temperature affects diffusion
- the greater the gradient the faster the diffusion
- net movement = particles moving in - particales moving out
- glucose to cells. amion acids from gut to cells
- oxygen to red blood cells for respiration
- increase surface area speeds up diffusion
- Tissues and organs
- tissue: a group of cells wiht a similar function working together
- e.g. muscular tissue, Glandular tissue, Epidermal tissue, Xylem , Phoem, Mesophyll tissue
- organ : a group of tissues working together
- stomach
- muscular, glandular, epithelial tissues
- stomach
- adaptations for exchange
- increase surface area speeds up diffusion
- good blood supply bring things in and ouyt mina strains a steep concentration gradient
- the greater the gradient the faster the diffusion
- tissue: a group of cells wiht a similar function working together
- Organ systems
- digestive system
- mouth, teeth, tongue
- silivary glands
- gullet
- stomach
- small intestine
- large intestine & appendix
- rectum and anus
- large intestine & appendix
- small intestine
- stomach
- gullet
- silivary glands
- liver
- gall bladder
- bile duct
- pancreas
- bile duct
- gall bladder
- mouth, teeth, tongue
- plant organs
- leaves stems, roots
- a group of organs working together to perform a function
- digestive system
- Animal and plant cells
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