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HBS Set #1

HBS Set #1- Human Body Systems (Unit 4)

TermDefinition
Cells The most basic building block of living things. Made up of organelles.
Tissue A group of cells that work together to perform a similar function.
Organs A group of tissue that works together to perform a similar function.
Organ systems A group of organs that work together to perform a similar function. There are 11 in the human body.
Organism A living thing. Multicellular organisms can be made up of several organ systems.
Organelles -> Cells -> Tissues -> Organs -> Organ systems -> Organisms The levels of organization from small to large.
Skeletal system Protects internal organs. Provides the body with support, shape, and structure. Allows for movement. Produces blood cells.
Muscular system Allows for movement by contracting muscles. Helps regulate body temperature through shivering.
Integumentary system Covers the body in a protective layer of skin, hair, and nails. Helps regulate body temperature and hydration.
Endocrine system Creates chemicals called hormones that regulate MANY things in the human body.
Regulate To control something. Hormones control the body to allow for homeostasis.
Hormone A chemical produced by the endocrine system that helps regulate conditions in the human body.
Immune system Protects the body from foreign pathogens. Helps repair injuries or illnesses.
Respiratory system Brings O2 (oxygen) into the body. Removes CO2 (carbon dioxide) from the body.
Circulatory / Cardiovascular system Transports nutrients, oxygen, hormones, waste, and other materials from one location in the body to another through the bloodstream
Excretory / Urinary system Removes liquid waste from the body through the bladder. Regulates the levels of H2O (water) in the body
Reproductive system Creates gametes (sperm and eggs) and sex hormones. Allows for sexual reproduction. Allows for the growth and development of a baby through pregnancy (female only).
Digestive system Brings food and water into the body. Breaks down food into smaller molecules. Absorbs nutrients from food. Absorbs water. Removes any unused food as solid waste from the body.
Nervous system Receives incoming information (stimulus) through sensory organs. Sends messages from the brain to the body (response).
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