The nucleus acts a the brain of a cell.
in a cell different cell organelles do different functions(e.g. mitochondria-respiration) in the same way our body has different organs or different organ systems to do different functions(heart-respiration;digestive system-complete digestion and excretion of food)
The functions of an exoskeleton: 1)To protect the internal organs against attack, accidental damage and the elements. 2)To give structural support to the internal organs, muscles & sinues (in much the same way as an endoskeleton does). 3)To facilitate the movement of limbs & appendages.
lol im guess that your doing unit 1: fundimentals of science ! same as me, well if im right, the question you have been given is not very clear in what it is asking you to define. my take on the question is not that you have to go through every system in the body (brain, endocrine ect) which is what some people define as tissues BUT to explain the 4 main types of tissue in the body being; nervous, muscle, epithelial and connective tissue. so in each of those main tissues types you will find there to be different types of cells doing different functions in the tissue. Take connective tissue for example, you have loose connective tissue and dense connective tissue. you have to state that they have different proerties (loose having capibillity of holding water and dense not ect) and say why that's important to the functions and building of the body. don't be confused by the eukaryotes part that's just an other way of saying animal body. So if you go to the edexcel website and look at the speification you can see that this is onyl for the merit so its rather important that you get this right before you can move onto distintion. I know this has not spcifically answerd you questions but that's becasue you need about 10 pages to go into detail about the different tissues and that's you work not mine (and i have NT done it yet :S) .... Good luck :-D
The outer cell wall may be composed of glucans - sugar based layers, or poly-muco-saccarides, or glycoproteins.Interestingly, while different cell types have different outer boundaries, they all have the same inner boundary: the bi-lipid layer called the cell membrane.
One cell or unicellular organism cells are of simpler forms mostly prokaryotes. In one cell organisms all the vital functions which are necessary for the life is carried by the same cell. In many cell or multicellular organisms the cells are complex and are called eukaryotic cells. In multicellular organism the cells are divided and are specialized in performing different functions according to need as some cells like blood work to carry oxygen, some cell hv functions like secreating some fluids like hormones or vitamins.
It directs the cell's activities, functions, structure. It's pretty much the "brain" of the cell.The Nucleolus is like nucleus in a nucleus. It does the same exact task, but is the HEADQUARTERS, the highest position of direction.
The DNA in all of your cells is the same because it contains the same genetic information. While brain cells and heart cells have different functions and characteristics, they both derive from the same original DNA template during development. The unique expression of genes in each type of cell leads to their specialized functions and structures.
Yes, the nucleus of a cell in your thigh muscle and the nucleus of a cell in your brain both contain the same set of genes. However, different genes are activated in different types of cells, leading to the development of specialized muscle or brain cells with distinct functions.
generally, tissue means a group of cells having same structure and function. so, a tissue cell is one, involved in the tissue having same structure and functions as all the other cells involved in that particular tissue.
DNA
same as a humans
Nucleus is the control center of the cell. It contains the cell's genetic material (DNA), which carries instructions for making proteins and controlling cell functions. The nucleus also regulates gene expression, cell growth, and cell division.
every cell is different, different size different functions different placements in the structure
every cell is the exact same
It is true thatÊthe DNA in the skin cell have the same sequence of bases as the DNA in the brain cell of the same organism. The sequence of the bases should be the same in all cells of an organism.
The DNA of cells in the same organism will be the same if no mutations occur. The only diffferences from your hair cells to your muscle cells is the structure of the cell. The structure of a cell gives the cell it's function.
Both the same time but the brain functions before the heart pumps