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Circulatory system	Moves blood, oxygen and nutrients around the body		bio-body-systems
Respiratory system	Brings in oxygen and removes carbon dioxide		bio-body-systems
Digestive system	Breaks down food and absorbs nutrients		bio-body-systems
Nervous system	Sends signals between the brain and body		bio-body-systems
Skeletal system	Supports the body, protects organs and makes blood cells		bio-body-systems
Muscular system	Moves the body and keeps the heart beating		bio-body-systems
Excretory (urinary) system	Removes liquid waste and balances water		bio-body-systems
Endocrine system	Uses hormones to control growth and body activities		bio-body-systems
Immune system	Defends the body against germs		bio-body-systems
Lymphatic system	Drains fluid and helps fight infection		bio-body-systems
Integumentary system	Skin, hair and nails; protects the body		bio-body-systems
Reproductive system	Makes new life		bio-body-systems
Main organs of the circulatory system	Heart, blood vessels and blood		bio-body-systems
Main organs of the respiratory system	Nose, trachea, bronchi and lungs		bio-body-systems
Main organs of the digestive system	Mouth, esophagus, stomach, intestines, liver, pancreas		bio-body-systems
Main organs of the nervous system	Brain, spinal cord and nerves		bio-body-systems
Main organs of the excretory system	Kidneys, ureters, bladder and urethra		bio-body-systems
Heart	Muscle that pumps blood		bio-body-systems
Lungs	Organs where oxygen enters the blood		bio-body-systems
Brain	Control center of the body		bio-body-systems
Stomach	Churns food with acid and enzymes		bio-body-systems
Small intestine	Absorbs most nutrients from food		bio-body-systems
Large intestine	Absorbs water and forms waste		bio-body-systems
Liver	Cleans blood and makes bile		bio-body-systems
Pancreas	Makes insulin and digestive enzymes		bio-body-systems
Kidneys	Filter blood and make urine		bio-body-systems
Skin	The body's largest organ		bio-body-systems
Esophagus	Tube that carries food from mouth to stomach		bio-body-systems
Trachea	Windpipe that carries air to the lungs		bio-body-systems
Diaphragm	Muscle below the lungs that helps you breathe		bio-body-systems
Alveoli	Tiny air sacs in the lungs where gases are exchanged		bio-body-systems
Artery	Blood vessel that carries blood away from the heart		bio-body-systems
Vein	Blood vessel that carries blood to the heart		bio-body-systems
Capillary	Tiny blood vessel where materials pass into and out of the blood		bio-body-systems
Red blood cells	Carry oxygen		bio-body-systems
White blood cells	Fight germs		bio-body-systems
Platelets	Help blood clot		bio-body-systems
Plasma	The liquid part of blood		bio-body-systems
Hemoglobin	Protein in red blood cells that carries oxygen		bio-body-systems
Neuron	Nerve cell		bio-body-systems
Spinal cord	Bundle of nerves in the backbone that links brain and body		bio-body-systems
Reflex	A fast automatic response		bio-body-systems
Hormone	A chemical messenger made by glands		bio-body-systems
Thyroid	Gland in the neck that controls metabolism		bio-body-systems
Pituitary gland	Small master gland at the base of the brain		bio-body-systems
Adrenal glands	Make adrenaline for the fight-or-flight response		bio-body-systems
Saliva	Starts breaking down food in the mouth		bio-body-systems
Bile	Fluid from the liver that helps digest fats		bio-body-systems
Peristalsis	Wave-like muscle squeezes that push food along		bio-body-systems
Antibody	A protein that fights a particular germ		bio-body-systems
Vaccine	Trains the immune system to recognize a germ		bio-body-systems
Epidermis	The outer layer of skin		bio-body-systems
Dermis	The thicker layer of skin below the epidermis		bio-body-systems
Melanin	Pigment that gives skin color and protects from the Sun		bio-body-systems
Pulse	The beat felt as the heart pushes blood through arteries		bio-body-systems
Blood pressure	The force of blood against vessel walls		bio-body-systems
Homeostasis	The body keeping conditions steady inside		bio-body-systems
Metabolism	All the chemical reactions that keep an organism alive		bio-body-systems
Which system includes the stomach?	Digestive		bio-body-systems
Which system includes the bones?	Skeletal		bio-body-systems
Which system includes the heart?	Circulatory		bio-body-systems
Which system includes the lungs?	Respiratory		bio-body-systems
Which system includes the brain?	Nervous		bio-body-systems