Outside boundary in animal cell
controls what goes into and out of the cell.
Also called the gate keeper.
Endoplasmic Reticulum( E.R)
The "passageways ( highways)" in the cell,
carry proteins and other materials from one part of the cell to another
flattened sacs and tubes
receive proteins and other newly formed material
distribute them to other parts of the cell
found in plant cells mostly, some plant like organisms have them too
capture sunlight to make food for the plants
Encloses cell contents, regulate movement of material in and out, maintains cell share communicate with other cells
Smooth ER (endoplasmic enticulum)
Lipid synthesis, drug detoxification(usually extensive in liver cells of drug addicts). Ca2+ storage
Modifies proteins, packages secreted proteins, sorts other proteins to vacuoles and other organelles
Provides structural support and helps with cell movement, transporting materials in the cell
the high degree of order within an organism's internal and external parts and in its interactions with the living world
a structure that carries out specialized jobs within an organ system leaf or flower in plant shoot system
groups of cells that have similar abilities and that allow the organ to function eg, vascular tissue in plants
tiny structures in cytoplasm that carry out functions necessary for the cell to stay alive eg mitochondria
during this process molecules of glucose are built using sunlight water and carbon dioxide using chlorophyll
this is important to all animal and plant cells because it contains much energy component of starch
these organelles produce various brightly colored pigments and are found primarily in cells of flowers, fruits, and berries.
Primary Cell Wall
this is a fairly strong wall the cell builds around itself as soon as it is created. this wall is compsed of cellulose
Secondary Cell Wall
this is an extremely strong wall that a cell builds around itself as soon as the cell has grown to its adult size. it is quite thick and is composed of cellulose
this is the space found in between one plant cell and a neighboring plant cell. It is not an empty space but is filled with a very strong "adhesive" called pectin.
these organelles are actually tiny packages which contain large numbers of organic molecules that are being transprted around within the cell. they serve as "delivery trucks" for the cell surrounded by tonoplast
these organelles contain acids and powerful anzymes that can destroy any invader that enters the cell. when a cell dies these rupture open and decompose every organelle within the cell
these are long, strong protein fibers that are layed out in all directions within the cell's cytoplasm. they serve as the cells own tiny skeleton. they give the cell it's shape and provide the cell with some strength
a cell has two of these and they are always located next to the nucleus in animal cells. they help the cell divide in two.
tiny structures found inside a cell that are responsible for performing all of the activities that occer inside the cell
theses are sometimes called the "power-houses" of the cell. they produce mose of the energy that powers all of the othe cell organelles
this organelle controls all of the actibities that ovver inside the cell. it is often thought of as the "brain" of the cell. it controls all of the other cell organelles
this is the fluid found inside the cell. this fluid consists mainly of water in which are dissolved all of the organic molecules the cell needs
or plasmalemma this is a barrier that completely surrounds the cell. it separates the cytoplasm inside the cell from the extracellular fluid outside the cell
these organelles are shaped like a "snowman" and are responsibel for building protein molecules for the cell
these are narrow tubes that course through the cell. proteins are transported to different parts of the cell through these tubes.
organic molecules produced by a cell are carried to this organelle where a code is attached to them this "zip code" indicates where inside the cell each organic molecule should be delivered. it is often called the cell's "post office"
lipid and glycogen molecules are made inside the "ER". toxic waste molecules that the cell produces are destroyed in "ER"
Flexible, thin-walled, spherical cells that perform a wide range of functions in plants mostly storage can be photosynthetic.
Plant cells that are elongated and occur in long strands or cylinders that provide support for surrounding cells.
Plant cells that lack cytoplasm when they mature, but retain their thick, cell walls.
A thin cylinder of meristematic tissue that can run the entire length of roots and stems.
Produces cells that develop tough cell walls that form a protective outside layer on stems and roots.
Cells in the xylem tissue that are tubular and stacked end to end forming long strands.
sieve tube members
Cells in the phloem tissue that lack a nucleus, but are long and cylindrical for conducting sugar water.
Consist of parenchyma, collenchyma, and sclerenchyma cells and have diverse functions, including photosynthesis, storage, and support.
thick, rigid membrane that surrounds a plant cell. Composed of microfibrils, glucose, cellulose and pectin
the formation of connections between adjacent cells for specialized cell-cell communication via pores in the primary cell wall through which the plasmalemma and endoplasmic reticulum of adjacent cells are continuous. Allows for direct flow of small molecules such as sugars and ions between cells
between the plant cell and primary wall, microfibrils are aligned mostly in the same direction - forms rigid 3D structure
is the process in a plant cell where the plasma membrane pulls away from the cell wall due to the loss of water through osmosis this decreases the protoplast volume, causing wilting, decreasing tugur pressure resulting in welting of the plant
the thick layer of protein and fat that surrounds the cell from the inside creating a selectively permeable membrane
Smooth endoplasmic reticulum
located in the cell's cytoplasm transports newly made proteins to the Golgi body membranes. It contains enzymes and produces and digest lipids and membrane proteins
Mitochondria (internal part)
inner membrane is called the matrix this is the site for oxidative respiration
a category of plastids lacking pigmentation, located in a plants root and non-photosynthetic. They provide a wide range of biosynthetic functions, synthesis of fatty acids and many amino acids
an elongated or disc-shaped organelle containing chlorophyll. They are composed of thylakoid disks, this is were P/S takes place
part of the chloroplast in plant cells in the inner membrane. It is the thick solution of enzymes around the thylakoids
a large membrane-bound space within a plant cell that is filled with fluid. They help maintain shape of the cell store nutrients, dump waste and create an osmotic gradient affecting tugur
waste removal. They contain enzymes that break down nucleic acids, proteins and carbohydrates
Why is it important that the xylem is composed of tracheids and vessel elements?
because maturation= death, there are no membranes or organelles left creating a hallow lignified tube great for large water transfer
located in the xylem long spindle shaped cells that arrange themselves in overlapping verticals filed lines which water can flow laterally between pit paris
porous layer in the xylem tracheids between the 2 pit pairs composed of 2 primary walls and a middle lamella.
Why are pit membranes important in water flow?
they help to prevent the spreading of gas bubbles within the xylem
What three different types of cells make up simple tissue?
parenchyma, collenchyma and sclermcyma cells
simple tissue cells involved in respiration P/S, storage and secretion. located in parenchyma tissue included in teh cortex of stems and roots, piths of stems, leaf mesophyll and they aggregate with other types of cells to form complex tissue
contain an irregularly thickened primary cell wall, these cells are located inside the epidermis in the stems and petiols, they support young leaf and stem tissue and petioles, they are living at maturity and often have chloroplast
composed of dead cells with extremely thick cell walls, supporting element in parts of the plant, broken into two types, fibers and Sclerids
type of scleremcyna cell that is long narrow and pitted with tapered ends, they may connect end to end or be individual cells, high load bearing capacity
type of sclermcyma cell, they are in small bundles of sclerenchyma tissue in plants that form durable layers, they are in many shapes and include cores of apples and the gritty texture of pears
interconnected network of cells spanning the entire plant body. Primary components are the xyelm and phloem, transport water, mineral and sugars for the plant
formed at root and shoot apex early in development, they form vascular bundles in leaves and young stems
Phloem, primary and secondary
transports or imports sugar through out the plant made during P/S primary in vascular bundles near xylem, secondary outside 2ndary xylem
What three cells compose the phloem?
sieve tube members, companion cells main ones and parenchyma cells for packing
part of the phloem an elongated rank of individual cells arranged end to end forming a tube that conducts food material throughout the plant
part of phloem lie connected to sieve tube members at maturity, they help load and unload phloem - surround guard cells making them contract or close
made of complex tissue generally one cell thick, they have no chloroplast living at majority, enlongated irregular contours on their cell walls which are covered in cutin
waxy substance of epidermis that forms the cuticle keeping water in and out, it covers all the plant except the root tip and shoot apex
several layers thick, secondary tissue type, forms layer of protection in older stems and roots, formed after the younger epidermis is split and lost. Ex bark of a tree trunk
A meristem that thickens the roots and shoots of woody plants. The vascular cambium and cork cambium are lateral meristems.
A small raised area in the bark of stems and roots that enables gas exchange between living cells and the outside air.
All of a plant's roots that anchor it in the soil, absorb and transport minerals and water, and store food.