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Cells: History.Theory.Vocab
Cells. Their history, the Cell theory, and some cellular vocab
23
Science
7th Grade
04/01/2009

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Term
Prokaryotic
Definition
a cell that doesn't have a nucleus
Term
Eukaryotic
Definition
a cell that has a nucleus
Term
difference between plant & animal cells
Definition
plant cells have chloroplasts and cell walls, while animals cells don't have either
Term
1)who was the first person to see a cell? 2) what was he looking at?
3)why did he name them "cells"?
Definition
1)Robert Hooke
2)cork
3) the shape reminded him of monk monastaries
Term
fill in the blanks:
In _year_ the German botanist _name_ discovered that all _noun_ were composed of cells
Definition
In 1838, the German Botanist Matthias Schleiden discovered that all plants were composed of cells.
Term
fill in the blanks: In _year_, a German zoologist named _name_ discovered that all _noun_ were composed of existing cells.
Definition
In 1839, a German zoologist named Theodore Schwann discovered that all animals were composed of existing cells.
Term
fill in the blanks and answer the questions:
1) who discovered that all cells come from __________?
2)in what year?
Definition
In 1855, German physician Rudolph Virchow found out that all cells come from other existing cells.
Term
who created the cell theory?
Definition
Matthais Schleiden, Theodore Schwann, and Rudolph Virchow
Term
What is the cell theory hints: omg dont give us hints!!!
Definition
All living things are composed of one or more cells. Cells are organisms' basic units of structure and function Cells come only from existing cells.
Term
wat does a cell membrane do?
Definition
the selectivly permeable outer boundry of the cell that allows food and oxygen to move into the cell, and wastes to leave it
Term
what is the nucleus
Definition
the structure inside a cell that directs the cells activities. basically, the brain. no its not its like the manager!! gosh ani or whoeva this is.
Term
chromatin
Definition
Hereditary material in a cells nucleus. chromatin coils into the form of chromosomes wen a cell divides.
Term
cytoplasm
Definition
gel-like substance in cell membrane that contains structures that carry out life process
Term
organelle
Definition
in eukaryotic cells~the structures in cytoplasm that break down food, move wastes, and store material
Term
endoplasmic reticulum
Definition
folded membrane~organelle~move materials around INSIDE the cell
Term
ribosomes
Definition
organelle~proteins are made
Term
golgi body
Definition
cell organelles consisting of stacks of membrane covered sacs that package and move proteins to the outsides of the cell
Term
mitochondria
Definition
organelles~break down food molecules~release energy
Term
lysosome
Definition
cytoplasmic organelle that contains chemicals and digests waste and worn out cell parts
Term
cell wall
Definition
in plants, rigid structure made of cellulose that surrounds a plant cell membrane and supports and protects it
Term
chloroplasts
Definition
plant cell organelles in which light energy is changed into chemical energy in the form of sugar during the process of photosythesis
Term
tissue
Definition
groups of similar cells that do the same sort of work; muscle tissue contracts.
Term
organ
Definition
a structure made up of different types of tissue that work together to do a specific job. ex: the heart
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