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cell theory
DNA is composed of four deoxyribonucleic acids. The sequence of these determines the sequence of amino acids in proteins. Proteins are essential in maintaining and multiplying cells. Additionally DNA is structured in such a way that it can be copied exactly when the cell prepares to divide.
A cell is the smallest part of a living organism that contains the identity within a strand of DNA. The cells of your body can grow into specialized functions such as heart or skin. Some microscopic organisms are 1 cell creatures or simple multi-cell organisms. That is what is mean by "All living organism are composed of cells."
Organisms composed of many cells are called multicellular organisms.
multicellular
Spicules are small, spike-like structures found in various organisms. They are composed of hard, sturdy compounds that often act as a protective covering on organisms, such as the spicules on some frogs' skin.
cell theory
Organisms composed of many cells are called multicellular organisms.
The class of cell structures are the organelles. These are sub-cellular structures composed of various proteins and other materials. The reproductive functions of eukaryotic cells occur in the cell's central body or nucleus.
What ARE anatomy and physiology? These are two areas of medical study. Anatomy is the discipline or area of study which deals with the structure of tissues, organs and organisms. Physiology is the discipline which is more concered with the function of cells, tissues, organs and organisms.
DNA is composed of four deoxyribonucleic acids. The sequence of these determines the sequence of amino acids in proteins. Proteins are essential in maintaining and multiplying cells. Additionally DNA is structured in such a way that it can be copied exactly when the cell prepares to divide.
A cell is the smallest part of a living organism that contains the identity within a strand of DNA. The cells of your body can grow into specialized functions such as heart or skin. Some microscopic organisms are 1 cell creatures or simple multi-cell organisms. That is what is mean by "All living organism are composed of cells."
Multicellular
Multicellular
It is CELL
A cell is the smallest part of a living organism that contains the identity within a strand of DNA. The cells of your body can grow into specialized functions such as heart or skin. Some microscopic organisms are 1 cell creatures or simple multi-cell organisms. That is what is mean by "All living organism are composed of cells."
Bodies of multicellular organisms, particularly animals, are organized on the basis of tissues, organ and organ systems. A tissue is composed of cells with similar structures and functions. An organ is composed of several tissues grouped together into a structural and functional unit. And an organ system is a group of organs that work together in the performance of a specific function.