Science Grade *8*
This is a test on science terms from Grade *8* on the unit:"Cells and Systems"
Terms
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- integumentary system
- protects the body's internal environment from the external environment
- function
- the actions and activities assigned to or required or expected of a person or group
- cell
- A basic unit of life
- respritory system
- transports oxygen into the blood cells
- osmosis
- diffusion of water
- nervous system
- coordinate and control the actions of all the organs
- eyepiece
- lens or set of lenses in a microscope that is closest to the user's eye
- objective lenses
- lens in an optical device suck as a microscope that gathers light
- Diffusion
- the particles going from going an area of High concentration to an are with low concentration
- atria
- the upper chambers of the heart that receive blood
- multicellular
- Made of More than one cell
- organ
- a group of tissues working together to perform a specific task
- response
- a reaction to something
- structures
- things that are built
- compound light microscope
- microscope that has 2 or more lenses and has a light source
- digestion system
- breaks down food
- system
- a group of parts that work together to perform a general function
- organelle
- a specialized part of a cell
- nutrients
- substances in food that your body needs to grow, to repar itself, and to supply you with energy
- tissue
- a part of an organism consisting of an aggregate of cells having a similar structure and function
- capillaries
- tiny blood vessels that connect arteries to veins
- organism
- any living thing
- ventricles
- lower chambers of the heart that pump blood to the body
- unicellular
- made of just one cell
- microscope
- device that is used to see very small objects
- adaptation
- physical characteristic of a species that increases the species
- stimulis
- change in the environment
- circulatory system
- transports oxygen, food, and other substances throughtout the body
- organ system
- Many groupings of tissues into a distinct structure, as a heart or kidney in animals or a leaf or stamen in plants, that performs a specialized task
- excretory system
- removes chemical and gaseous waste waste
- skeletal system
- provides a moveble support frame for the body
- selectively Permeable
- something can go through the cell membrane and some cannot