science chapter 6 model of cells

two types of organisms

unicellular and multicellular

system

different organs working together to perform one main function, giving rise to an organ system

organs

different tissues working together to perform a specific function forming an organ

Tissues

the same type of cells working together to perform a specific function

Cells

cells are the basic unit of life, living organisms are made of cells

Plant Cells

cells that have a cell wall, chloroplasts for photosynthesis, a large central vacuole, a cell membrane, a nucleus, cytoplasm and mitochondria

Animal Cells

cells that do not have a cell wall or chloroplasts and have many small vacuoles, a cell membrane, a nucleus, cytoplasm and mitochondria

Cell Membrane

A selectively-permeable outer layer that surrounds the cell, controlling the movement of substances in and out of the cell

Cytoplasm

The jelly-like substance that fills the cell, contains water and other substances like nutrients, the place where chemical reactions occur

Nucleus

The membrane-bound organelle that contains the cell's genetic material (DNA) and controls cellular activities.

Chloroplasts

Organelles found in plant cells that conduct photosynthesis, converting sunlight into chemical energy.

Cell Wall

A thick and rigid outer layer surrounding the cell membrane of a plant cell, providing structure and support.

division of labour

the breakdown of work into small and specific tasks for maximum efficiency and also occurs at cellular level

cell division and differentiation (cells become ………… for a ……………. ………………., differ in ……….., ……….. and …………………, are …………………….. to ……………….. ……………….. ………………)

cells become specialised for a specific function
differ in size, shape and structure
are adapted to perform specific functions

one limitation of model of cells: the model of cells we use are _ and . However in reality, cells are __ and

two-dimensional; static; three-dimensional; dynamic

one limitation of model of cells; the model we use show the _____ that exist in ____________

organelles; generalised cells without specific functions

one limitation of cell models: we only use _ in typical cell models but cells usually _ __ ____ ______ ___ _ according to their functions

2 shapes; exist in many shapes and sizes

one limitation of cell models: they do not discuss ____ ___ like ___ or ; ______ are required to ___ these __ _

life processes; cell division; differentiation; multiple models; represent; life processes

one limitation of cell models: living organisms are ________ ____ _ __: animal, plant, fungi, protist and monera, but we only represent cells from ___ __ ___ _ (_ ___ _)

divided into 5 kingdoms; two of the five kingdoms; plant and ani