Across
- 1. Organ that excretes waste products and excess fluid as urine.
- 5. Junction between two nerve cells, consisting of a minute gap across which nerve impulses pass, via a chemical called a neurotransmitter.
- 7. Cells in a sense organ that detect changes in the environment.
- 10. Organ that is a gland in the digestive and endocrine system of vertebrates. As an endocrine gland, it produces several important hormones, including insulin and glucagon.
- 11. Large butterfly-shaped endocrine gland on the front of the neck producing various hormones.
- 16. Organ of the body that responds to external stimuli by sending nerve impulses to the sensory nervous system.
- 19. Organ involved in the production and removal of blood cells in most vertebrates and forming part of the immune system.
- 21. Body system made up of a series of glands that secrete chemicals called hormones into the blood in response to changes in the body.
- 24. Organ that responds to a stimulus.
- 25. Nervous pathway involving a small number of neurones. A reflex occurs when nervous impulses travel from the receptor to the spinal cord then to the effector organ.
- 26. Pea-sized endocrine gland at the base of the brain whose hormonal secretions control the other endocrine glands.
- 30. Main nerve cord carrying nervous impulses to and from the brain. It is protected by the vertebrae of the backbone.
- 31. System that works to eliminate waste from the body.
- 32. Body system that includes the heart, blood vessels, blood, lymph and the lymphatic vessels and glands. It works as a transport and delivery system and is responsible for the delivery of oxygen and nutrients to all cells, as well as the removal of carbon dioxide and waste products.
- 34. Nerve cell in the sense organs that detects change in the environment and sends a message to the central nervous system.
- 35. Part of the nervous system made up of the brain and spinal cord; necessary for thought processes.
- 36. Location of objects by reflected sound. A process seen in organisms such as dolphins and bats.
- 37. Chemical that controls the activities of organs. Hormones can be described as chemical messengers.
- 39. Type of organ that makes a substance for release (e.g. hormones). Substances are often released into the bloodstream or they may be released into cavities inside the body or its outer surface.
- 40. Nerve cell.
- 41. Control centre of the body and part of the central nervous system.
- 42. Group of similar cells working together on a particular job
- 43. The reaction of a living organism to a specific stimulus.
Down
- 2. A disease where the body cannot maintain healthy levels of glucose (sugar) in the blood.
- 3. A number of small swellings in the lymphatic system where the fluid lymph is filtered and the white blood cells (lymphocytes) are formed
- 4. A hormone that is released by the pancreas to raise the concentration of glucose (sugar) in the bloodstream.
- 6. Various tissues joined together make up an organ. Each organ has a specific job within the body.
- 8. Organs that produce hormones. Endocrine glands release hormones into the bloodstream for transport to target organs.
- 9. A living thing. Includes plants, animals, fungi and microscopic life forms.
- 12. Two small glands, one located near the upper part of each kidney, that function in the endocrine system. The glands secrete the hormone adrenaline as well as other important hormones.
- 13. Body system that breaks down and absorbs food.
- 14. The smallest unit of living things.
- 15. Nerve cell that causes a muscle or gland to respond to a stimulus.
- 17. Bundle of neurons.
- 18. An organism’s reaction to threat, in which certain hormones are produced, priming them for fighting or fleeing
- 20. Small endocrine gland in the brain. It produces a hormone (melatonin) that affects such things as wake/sleep patterns.
- 22. Group of organs responsible for carrying oxygen from the air to the bloodstream and for expelling carbon dioxide.
- 23. Change in the environment that can be detected and responded to.
- 27. Part of the nervous system. An elaborate network of nerves throughout the body that receives information from inside and outside the body and relays it to the central nervous system.
- 28. Group of organs working together to keep an organism alive and healthy.
- 29. gland Small endocrine glands in the neck that produce parathyroid hormone.
- 33. Sensory receptor that senses pain.
- 38. Female reproductive organ in which ova or eggs are produced and where hormones are secreted (e.g. oestrogen and progesterone).