Science Grade 8 - Cells

Animal Cell

The basic cell that forms the building blocks of all living animals. Within the cell are several organelles that help perform a function.

Cell Theory

The concept that all living organisms have 1 or more cells, which are the basic units of structure and life.

Cells

The smallest unit that can perform life functions of all living organisms. Which help to make people, animals, and plants.

Cytoplasm

A gel-like liquid that fills the inside of a cell.

Diffusion

The movement of particles from where it moves from a higher concentrated area to a lower concentrated area. The movement continues until the particles are spread out.

Membrane

Something found in all cells that separate the inside of a cell from the outside, which the protects the cytoplasm of the cell.

Microscope

A scientific instrument that makes it easier to see objects that may be too tiny to see with the naked eye.

Mitochondria

The function that powers more than 90% of your human cells.

Multicellular

A organism that is made of more than one cell that works together.

Nucleus

AThe structure in a cell that carries the DNA, it controls activities and growth of the cell.

Organ system

A group of organs that work together in the body to perform a complicated function. For example, organs like the lungs and teeth help to make up the respiratory system.

Organ

A build up of similar tissues that create an _____ to perform a function in the body, for example, hearts, lungs, and eyes, are all organs.

Organelle

Something that makes up the insides of a cell. Each part of a cell has a job and a function, and the _________ is the name of that particular part of the cell ( e.g, nucleus, mitochondria, cytoplasm, etc.)

Organisms

Any animal or plant cells, or any cell that exists on its own.

Osmosis

The idea that water needs to pass through the cells. The water particles pass from a higher concentrated area to a lower concentrated area to achieve an equal level of water.

Plant Cell

Forms the basis of life for plants. They have similar cells to that of an animal cell, but they also have a cell wall and a chloroplast.

Selective Permeability

The idea that only a select few molecules can leave and exit a cell.

Tissue

Similar cells combined form _____. The four major types of ______ are epithelial, connective, muscular, and nervous.

Unicellular

These organisms only have one cell, but can still perform basic functions, like moving, getting nutrients, and exchanging gas. An example would be amoeba.