32 terms

The Human Body--Quizlet

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cell
(biology) the basic structural and functional unit of all organisms
cell membrane
thin, flexible barrier around a cell; regulates what enters and leaves the cell
nucleus
control center of the cell
cytoplasm
a jellylike fluid inside the cell in which the organelles are suspended
tissue
group of similar cells that perform a particular function
muscle tissue
A body tissue that contracts or shortens, making body parts move.
nervous tissue
A body tissue that carries electrical messages back and forth between the brain and every other part of the body.
connective tissue
provides support for your body and connects all its parts
epithelial tissue
tissue that covers the surface of the body and lines internal organs
organ
group of tissues that work together to perform closely related functions
organ system
A group of organs that work together in performing vital body functions.
skeleton
the inner framework made up of all the bones of the body
skeletal muscles
the muscles attached to bones that enable you to move
joint
(anatomy) the point of connection between two bones or elements of a skeleton (especially if the articulation allows motion)
nutrient
a substance in food that provides energy or helps form body tissues and that is necessary for life and growth.
absorption
the process of absorbing nutrients into the body after digestion
glands
body organs or structures that produce secretions
stimulus
a change in an organism's surroundings that causes the organism to react
response
a reaction to a stimulus
hormones
chemical messengers that are manufactured by the endocrine glands, travel through the bloodstream, and affect other tissues
homeostasis
the ability of a living thing to keep conditions inside its body constant
stress
the body's and mind's response to a demand
skeletal system
supports and protects the body
integumentary system
organ system that includes har, skin, and nails and protects the body from pathogens and maintains homeostasis
muscular system
the organ system whose primary function is movement and flexibility
circulatory system
The human body system that contians the heart, blood, and all of the blood vessels. It delivers all the nutrients to the cells
respiratory system
organ system that exchanges oxygen and carbon dioxide (trachea, lungs, bronchi, alveoli)
digestive system
body system the breaks down food and absorbs nutrients
excretory system
group of organs including the kidneys, liver, skin, large intestine and lungs that purify the body by the elimination of waste matter
nervous system
consists of brain, spinal cord, and nerves and regulates the body's responses to internal and external stimuli
endocrine system
collection of glands that secrete hormones into the blood which regulate growth, development, and homeostasis
reproductive system
organ system which functions in creating offspring (penis and testes in males, ovaries, uterus, and vagina in females)