What are the parts and functions of an animal cell?(with definitions)?

Question

cell membrane,
nucleus,
nuclear membrane,
vacuole,
free ribosomes,
chromosomes,
cytoplasm,
mitochondria,
lysosome

please answer because i dont have a science book 2 help me and i am very bad w/ the internet

Answer 1

Cell membrane - Separation between intra and extracellular mediums. Composed basically of double layer of phospholipids and proteins.
Nucleus - The cell "brain", where most of the genetic material (chromosomes, which are made of DNA) are located. The nuclear membrane separates the nucleus from the cytoplasm.
Cytoplasm - Intracellular space where all the organelles are.
Vacuoles - Storage of substances.
Ribosomes - Protein synthesis.
Rough and smooth endoplasmic reticulum - Protein metabolism.
Golgi complex - Mostly lipid metabolism.
Lysosomes - Enzyme storage.
Mitochondria - Energy production; the other organelle containing DNA.
Vesicles (endossomes, etc) - Incorporation of substances.
I think these are the main organelles in an animal cell. Hope I didn't forget anything major and didn't give any wrong information. Obviously, this is very simple and incomplete. Try www.wikipedia.com. Hope it helps. Happy New Year!

Answer 2

The following is a glossary of animal cell terms:
cell membrane - the thin layer of protein and fat that surrounds the cell. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.
centrosome - (also called the "microtubule organizing center") a small body located near the nucleus - it has a dense center and radiating tubules. The centrosomes is where microtubules are made. During cell division (mitosis), the centrosome divides and the two parts move to opposite sides of the dividing cell. The centriole is the dense center of the centrosome.
cytoplasm - the jellylike material outside the cell nucleus in which the organelles are located.
Golgi body - (also called the Golgi apparatus or golgi complex) a flattened, layered, sac-like organelle that looks like a stack of pancakes and is located near the nucleus. It produces the membranes that surround the lysosomes. The Golgi body packages proteins and carbohydrates into membrane-bound vesicles for "export" from the cell.
lysosome - (also called cell vesicles) round organelles surrounded by a membrane and containing digestive enzymes. This is where the digestion of cell nutrients takes place.
mitochondrion - spherical to rod-shaped organelles with a double membrane. The inner membrane is infolded many times, forming a series of projections (called cristae). The mitochondrion converts the energy stored in glucose into ATP (adenosine triphosphate) for the cell.
nuclear membrane - the membrane that surrounds the nucleus.
nucleolus - an organelle within the nucleus - it is where ribosomal RNA is produced. Some cells have more than one nucleolus.
nucleus - spherical body containing many organelles, including the nucleolus. The nucleus controls many of the functions of the cell (by controlling protein synthesis) and contains DNA (in chromosomes). The nucleus is surrounded by the nuclear membrane.
ribosome - small organelles composed of RNA-rich cytoplasmic granules that are sites of protein synthesis.
rough endoplasmic reticulum - (rough ER) a vast system of interconnected, membranous, infolded and convoluted sacks that are located in the cell's cytoplasm (the ER is continuous with the outer nuclear membrane). Rough ER is covered with ribosomes that give it a rough appearance. Rough ER transports materials through the cell and produces proteins in sacks called cisternae (which are sent to the Golgi body, or inserted into the cell membrane).
smooth endoplasmic reticulum - (smooth ER) a vast system of interconnected, membranous, infolded and convoluted tubes that are located in the cell's cytoplasm (the ER is continuous with the outer nuclear membrane). The space within the ER is called the ER lumen. Smooth ER transports materials through the cell. It contains enzymes and produces and digests lipids (fats) and membrane proteins; smooth ER buds off from rough ER, moving the newly-made proteins and lipids to the Golgi body, lysosomes, and membranes.
vacuole - fluid-filled, membrane-surrounded cavities inside a cell. The vacuole fills with food being digested and waste material that is on its way out of the cell.

Answer 3

To "Q & A MAN": Your argument isn't very valid. When a woman has conceived a child, the baby, of course, isn't immediately fully grown. It starts off as a fetus without all of the bodily systems that you would see in a human. Also, even when the child is born, it continues to grow. The child even ends up with more bones than it once had; certain functions of an infant's brain get weaker as they get older too because they end up being obsolete. As we grow, our cells continuously multiply causing us to get greater in size, so the theory that we all started from a single celled organism isn't too far fetched. Not to mention, a lot of microorganisms that cause illness evolve as our medicine gets more advanced. It's all about the organism adapting so that it can be ahead of the game and insure the continuation of the species. EDIT: Another thing that I forgot to mention is that our "design" isn't even flawless. We're susceptible to mutations and illnesses. Also some parts of the body aren't really necessary; there are some things that our bodies can't naturally recover from as well. Now to the question: The only part of the 'God concept' that seems reasonable is the "let there be light" thing. Maybe this was possibly the big bang. Maybe this universe was created accidentally by some intelligent beings or some natural occurring phenomenon. Perhaps it'll happen again. The idea of an omnipotent being has simply evolved with mankind over time to explain what couldn't be explained. Even now when we can't explain something we associate it with things that we are already familiar with.

Answer 4

Too much to answer here, but you can also try out this website.

http://en.wikipedia.org/wiki/Cell_(biology)