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Chapter 17
The Body Systems
| Question | Answer |
|---|---|
| Appendix | Finger-shaped organ attached to the large intestine; made of lymphatic tissue. |
| Arteries | Blood vessels that carry oxygen-rich blood. |
| Bladder | Organ that stores urine until it can be pushed out of the body. |
| Body system | Collection of organs that work together. |
| Brain stem | Part of the brain that controls the heartbeat and breathing rate. |
| Bronchi | Two air passages, each of which connects the trachea to a lung. |
| Capillaries | Small arteries that deliver oxygen and nutrients to cells and pick up cells’ waste. |
| Cerebellum | Part of the brain that controls coordinated, smooth muscle activity. |
| Cerebrum | Largest part of the brain, which interprets information from the sensory organs; controls muscle actions and is responsible for intelligence, memory, and personality. |
| Circulatory system | Body system formed by all the structures that move blood through the body. |
| Diaphragm | Sheet of muscle beneath the lungs and above the abdomen that contracts and relaxes to help the chest expand so a person can inhale or shrink so a person can exhale. |
| Digestive system | Body system that breaks down food to provide nutrients and energy; also removes solid waste from the body. |
| Endocrine system | Body system that produces chemical messengers called hormones, which regulate body processes. |
| Gallbladder | Organ in which bile is stored until needed to digest food. |
| Gland | Group of cells that produce and release substances into the body. |
| Heart | Hollow, muscular organ located in the center of the chest; pumps blood into the circulatory system. |
| Integumentary system | Body system that covers and protects the entire body. |
| Joint | Location in the body where two or more bones meet and are held together. |
| Kidneys | Two bean-shaped organs that filter blood and make urine. |
| Ligaments | Strong bands of tissue that hold together bones at joints to allow movement. |
| Liver | Large brown organ to the right of the stomach that has many jobs, including making bile. |
| Lymphatic system | Body system of organs and tissues that help fight infections. |
| Muscular system | Body system that helps the body move and aids other body systems. |
| Nervous system | Body system that allows people to think, use the senses, move, and maintain important body processes. |
| Neuron | Cell that is specialized to receive and send signals. |
| Organ | Collection of tissues that perform a specific job. |
| Pancreas | Fish-shaped organ behind the stomach that makes many kinds of enzymes needed for digestion. |
| Pituitary gland | Master gland of the body, which releases hormones to control other endocrine organs. |
| Plasma | Watery part of blood. |
| Respiration | Exchange of oxygen and carbon dioxide between the body and the air around it. |
| Respiratory system | Body system of organs that obtain vitally important oxygen from the outside world. |
| Skeletal system | Body system made up of 206 bones that provides structure, shape, and protection to the body. |
| Spinal cord | Part of the nervous system that carries nerve signals between the brain and the body. |
| Spleen | Organ filled with white blood cells; filters blood. |
| Tendons | Structures made of tough tissue that connect muscle to bone. |
| Thyroid hormone | Substance produced in the thyroid that increases the rate at which the body uses energy. |
| Tissue | Collection of similar cells that do a certain job for the body. |
| Urinary system | Body system that removes liquid waste from the body. |
| Veins | Blood vessels that carry oxygen-poor blood. |