Chapter 11- Instruction To The Human Body Lessons 1-3 Flashcards
Cell membrane
Forms outside border of cell, controls what enters and leaves the cell
Cell
The basic unit of structure and function in a living thing
Nucleus
Control center of cell
Cytoplasm
A clear gel-like substance that keeps organelles from floating around
Tissue
A group of similar cells that perform the same function
Muscle tissue
Contracts and shortens for movement
Nerve tissue or nervous tissue
Carries electrical message between brain and body
Connective tissue
Connects and supports body
Epithelial tissue
Covers the inside and outside surface of body
Organ
A structure that is made up of different tissues
Organ system
A group of organs that work together, carrying out major functions
Skeleton
The bones of an organism
Skeletal muscles
Attached to bones to force movement
Joint
Places at which skeletal system can move
Nutrient
Substance that you get from food that your body needs, to carry out certain processes
Absorption
When nutrients move into bloodstream
Gland
Organs that release chemical signals directly into the blood
Stimulus
Signal in enviroment
Response
Reaction
Hormone
Chemical signals in the bloodstream
Homeostasis
The condition in which an organism’s internal environment is kept stable in spite of changes in the external environment.
Stress
The reaction of a person’s body to potentially threatening, challenging, or disturbing events.
