Cells, Tissues And Organs

Cell

Lots of cells make up tissues Lots of tissues make up organs Lots of organs working together make up organ systems Lots of organ systems working together make up an organism

Red blood cell Nerve cells Egg cell Sperm cell

Root hair cells Palisade cells

To carry oxygen Large surface area for oxygen Biconcave shape Haemoglobin that binds to the oxygen to form oxyhaemoglobin

To carry nerve impulses to different parts of the body Long Connections at each end Can carry electrical signals

To provide nourishment for the embryo before implantation in the womb Large Cytoplasm contains nutrients and energy rich yolk which will nourish the embryo before implantation

To reach the female egg and fertilise it Long tail for swimming Head containing chemicals to help penetrate the female egg

Absorbing water and minerals from the soil Large surface area- because of extension of cytoplasm Thin cell wall for minerals to pass through

To absorb sunlight needed for photosynthesis Large surface area Many chloroplasts - containing chlorophyll for photosynthesis

Transports sugar around a plant End walls have holes to allow sugar to be transported to the next cell

Support of water transport up the plant Hollow tube Wall strengthened by lignin Lignin deposited as rings or spirals allowing expansion and contraction