Cells Tissues And Organs Flashcards
Neurones
Long and thin
Form connections with other neurones
Can carry electrical impulses in one direction
Fat cells
Specialized cell
Can expand up to 100x
Have little normal cytoplasm
Red blood cells (rbc)
Large surface area
Small diamater
No nucleus
Contain haemoglobin
Muscle cells
Elongated contain many mitochondria
Can contract
Sperm cells
Large nucleus
Contain digestion enzymes
Many mitochondria
Have a long tail
Gland cells
Large cells
Lie next to blood capillaries
Able to manufacture ans secrete chemicals
Egg cells
Large in diameter
Contain stored food
Large nucleus
Plant cells
Cellulose cell wall Cell Vacuole membrane Cytoplasm Nucleus Large surface area, many tightly packed chloroplasts
Root hair cells
Thin membrane
Large surface area
Have no chloroplasts because root hairs cells don’t need the cause they are underground
Guard cells
Underside of the leaf
Half circle shape, found In Pairs
Xylem cells
Hollow
Form long tubes
Walls contain lignin
Epidermal cells
Closely fitting
Thin Waxy layer
Muscles cells
Contain a large. Numbers I’d mitochondria because they need lot of every to work
Diffusion
The movement of particles from s region of high concentration to a region of low concentration often. Across a selectively permeable membrane until equilibrium is reached
The rate of diffusion affected by
Energy eg temperature
Pressure
Concentration difference
Distance to travel
