Human Body System Cross-Word Puzzle

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Across
  1. 2. A short band of tough, flexible fibrous connective tissue which connects two bones or cartilages or holds together a joint.
  2. 3. Each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed. Lungs are characteristic of vertebrates other than fish, though similar structures are present in some other animal groups.
  3. 6. The female reproductive cell.
  4. 8. The organ in the lower body of a woman or female mammal where offspring are conceived and in which they gestate before birth; the womb.
  5. 9. A hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation. In vertebrates there may be up to four chambers (as in humans), with two atria and two ventricles.
  6. 10. Its an organ system consisting of skeletal, smooth and cardiac muscles.
  7. 11. The network of nerve cells and fibers which transmits nerve impulses between parts of the body.
  8. 14. The red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body.
  9. 15. The thin layer of tissue forming the natural outer covering of the body of a person or animal.
  10. 17. A whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord, and impulses from these to the muscles and organs.
  11. 20. It involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body.
  12. 21. The action or process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote.
  13. 23. A regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.
  14. 24. Firm, whitish, flexible connective tissue found in various forms in the larynx and respiratory tract, in structures such as the external ear, and in the articulating surfaces of joints. It is more widespread in the infant skeleton, being replaced by bone during growth.
  15. 25. Any of the muscular-walled tubes forming part of the circulation system by which blood (mainly that which has been oxygenated) is conveyed from the heart to all parts of the body.
  16. 27. A part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.
  17. 28. A band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
Down
  1. 1. The nervous system outside the brain and spinal cord.
  2. 4. The study of heredity and the variation of inherited characteristics.
  3. 5. Its the biological system made up of all the anatomical organs involved in sexual reproduction.
  4. 7. A specialized cell transmitting nerve impulses; a nerve cell.
  5. 12. Its a messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs.
  6. 13. A flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone.
  7. 14. Any of the pieces of hard whitish tissue making up the skeleton in humans and other vertebrates.
  8. 16. The system that circulates blood and lymph through the body, consisting of the heart, blood vessels, blood, lymph, and the lymphatic vessels and glands.
  9. 18. Any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood toward the heart.
  10. 19. A self-replicating material that is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
  11. 22. Its a biological system consisting of specific organs and structures used for gas exchange in animals and plants.
  12. 26. Any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products.
  13. 29. Its the male reproductive cell.