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

Free flashcards from Peabody at peabody.kids/flashcards/bio-body-systems