Levels of organization - ANSWER atom, molecule, macromolecule, organelle, cell, tissue,
organ, organ system, organism
Tissue - ANSWER A group of similar cells that perform the same function.
Epithelial tissue - ANSWER A body tissue that covers the surfaces and cavities of the body
Muscle tissue - ANSWER A body tissue that can contract and relax to allow the body to
move
Connective tissue - ANSWER A body tissue that provides support for the body and con-
nects all of its parts. Includes bones, tendons, blood, and ligaments
Nervous tissue - ANSWER A body tissue that rapidly carries electrical messages back and
forth between parts of the body.
Organism - ANSWER anything that is alive
Organ systems of the body - ANSWER integumentary, skeletal, muscular, nervous, endo-
crine, cardiovascular, lymphatic, respiratory, digestive, urinary, reproductive slime crud rn
Integumentary system - ANSWER Consists of the skin, mucous membranes, hair, and
nails;
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, Skin layers (outer to inner) - ANSWER epidermis, dermis, hypodermis
Hypodermis (subcutaneous layer) - ANSWER Composed primarily of adipose tissue; as-
sists in insulation of the body and temperature regulation
Skin functions - ANSWER Protection, temp regulation, excretion, sensation, vit d synthe-
sis
Skeletal system - ANSWER Protects and supports body organs provides a framework for
the muscles use to support movement
Made up of bones and joints
Houses blood cells
Stores minerals
Muscular System - ANSWER allows the body to move because muscles attach to bones
and contract and relax in a coordinated fashion
Types of muscle tissue - ANSWER skeletal, cardiac, smooth
Nervous system - ANSWER allows the cells of the body to communicate with one another
and respond to the body's internal and external environment through electrical impulses
Digestive system - ANSWER Breaks down food into absorbable units that enter the blood
through the small intestine for distribution to body cells.
Parts of nervous system - ANSWER brain, spinal cord, nerves
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