Carries impulses from the receptors on the retina to the brain

The brain or spinal cord

Chemical messengers that travel in the blood to target organs.

Muscles or glands that bring about a response.

The hole in the centre where light enters

Headaches and nausea. Still contract STIs.

37 degrees Celsius

1) Menstruation-the uterus lining breaks down2) The uterus lining builds up again3) Ovulation-Around day 14 a egg is released from an ovary.4) The wal...

There will be no auxin as auxin is found in the shoot. The plant will not grow.

A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature.

Contact lenses, laser eye surgery and replacement lens surgery.

PRO: Gives an infertile couple a child.CON: Multiple births, these are risky, more chance of still birth and miscarriage.CON: Success rate is lowCON:...

Outer transparent layer, bends/refracts light into the eye