24 terms

6th Grade- Chapter 16 Cells

Cells and cell theory
capture energy from sunlight and use it to produce food for the cell
cell wall
a rigid structure that surrounds the cell membrane and provides support to the cell
Robert Hooke
English scientist who was the first to observe "small chambers" in cork and call them cells. (1665)
cell theory
1.)idea that all living things are composed of cells 2.)cells are the basic units of structure and function in living things 3) new cells are produced from existing cells
Ocular Lens X Objective Lens
stem cell
Long tube-shaped cells that move water and other materials through the plant.
small structures in the cytoplasm that do special jobs
the process by which plants make food
leaf cells
brick-shaped and contain many chloroplasts; the site of photosynthesis
root cells
block shaped and do not contain chloroplasts; no photosynthesis occurring because they are underground where there is no sunlight
levels of organization of the human body
Cells, tissues, organs, organs systems, organism
smallest organisms on Earth; one-celled organisms that contain no organelles
groups of similar cells that perform a specific function in an organism
the basic structural and functional unit of all organisms
a structure in the body that is composed of different kinds of tissue
organ system
group of organs that work together to perform a specific function
cellular respiration
The process by which a cell's mitochondria use oxygen to produce energy from food.
An instrument with lenses and light that is used to observe objects too small to be visible with only the eyes.
nerve cell
Long and have many branches which allows them to receive and deliver messages quickly.
bone cell
Surrounded by a hard substance made of calcium and phosphorous.
fat cell
Can store so much fat that the nucleus gets pushed against the cell membrane.
muscle cell
Usually long and have many fibers that can constract and relax.
skin cell
Mostly flat and close together. They form a protective layer for your body.
Organ systems each performing a specific function working together.