Biology Crossword

6. A blood vessel that carries blood away from the heart.
8. Chemicals secreted by lymphocytes, which attach to antigens and help to destroy them.
9. Like carbohydrates, they can be used in a cell to release energy.
11. It alters the rate of a chemical reaction, without it being changed itself.
13. It takes food down the stomach behind the trachea.
14. The process of getting rid of undigested cellulose in faeces.

1. The diffusion of water molecules from a region of high water potential to a lower one through a partially permeable membrane.
2. A junction between two nerve cells consisting of a minute gap across.
3. It has lignified walls to support and transport water in plants.
4. This is the group that humans belong to.
5. They are the powerhouses of all cells except prokaryotes.
7. A person is said to have this when the control of blood glucose concentration does not work.
10. Another name for leaf stalk.
12. Type of respiration making our cells release energy from glucose by combining it with oxygen.