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Biological illustration is the use of technical illustration to visually communicate the structure and specific details of biological subjects of study. This can be used to demonstrate anatomy , explain biological functions or interactions, direct surgical procedures, distinguish species, and other applications.
As an avid wildlife artist who disdained drawing from mounts or photographs, instead preferring to draw from life, Knight grew up drawing living animals, but turned toward prehistoric animals against the backdrop of rapidly-expanding paleontological discoveries and the public energy that accompanied the sensationalist coverage of these ...
Plate 4, Figure 9 from the book, showing drawings of what are now called Schwann cells in the vagus nerve of a calf. The book is credited with the first description of what would later be called Schwann cell, a type of glial cell. [3] The description of the cells was evident from passages such as: [3]
There are some structures I did not add because it was not clear to me how they should look. For all have doubts between cytoskeleton, microfibers and microtubules. If you would like to make another language version of it, message me and I can make an image without text for you or message me the names in the language you want them to appear.
1839: Theodor Schwann [43] and Matthias Jakob Schleiden elucidated the principle that plants and animals are made of cells, concluding that cells are a common unit of structure and development, and thus founding the cell theory. 1855: Rudolf Virchow stated that new cells come from pre-existing cells by cell division (omnis cellula ex cellula).
Animal tissues are grouped into four basic types: connective, muscle, nervous, and epithelial. [4] Collections of tissues joined in units to serve a common function compose organs. While most animals can generally be considered to contain the four tissue types, the manifestation of these tissues can differ depending on the type of organism.
English: The gastrointestinal tract, also called the digestive tract, alimentary canal, or gut, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste.
There are four basic types of animal tissues: muscle tissue, nervous tissue, connective tissue, and epithelial tissue. [5] [9] All animal tissues are considered to be subtypes of these four principal tissue types (for example, blood is classified as connective tissue, since the blood cells are suspended in an extracellular matrix, the plasma). [9]