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--- public:nnels:etext:images:alt_text_examples:human_anatomy [2022/10/17 20:23]
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+++ public:nnels:etext:images:alt_text_examples:human_anatomy [2024/05/09 05:04] (current)
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-=======Human Anatomy and Diagrams=======
+=======Examples: Human Anatomy and Diagrams: Long Description=======
 <note important>These are examples only. Context is key! It will always influence how you describe an image. For full instructions on how to write see [[public:nnels:etext:complex-image-description#writing_complex_descriptions|Complex Image Descriptions]] and [[public:nnels:etext:images:general_guidelines|General Guidelines]].</note>
 <note tip>If you have any questions, post your question on the [[public:nnels:etext:images:alt-text_q_a|Alt-Text Q&A]]</note>
+----
+This first example uses the clock method and meaningful lists. It was written by Rachel Osolen and Leah Brochu for a webinar on Math and Science Images.
+{{ :public:nnels:etext:images:alt_text_examples:cell_diagram.png?400 |}}
+[Alt-Text] A 3-D illustration of a cross section of a  cell revealing its interior components. Each part is labelled. See link below for a long description.
+[Long Description] Terms from the labels in the diagram appear within quotation marks throughout the description.
+The cell has a thin, peach coloured, spherical outer “Cell Membrane”, with a cluster of hair-like roots called “Cilia” projecting from the bottom. The cell is cut in half revealing the inner parts.
+In the center is the yolk-like nucleus, which includes:
+  * “Nuclear Membrane”: A dark purple skin like covering around the Nucleus. It is full of large pores.
+  * “Nucleolus”: the core of the nucleus; surrounded by a darker, bumpy, sphere.
+  * Encircling the “Nucleus” is the smooth turquoise ribbon-like “Rough endoplasmic reticulum (covered with fixed ribosomes.)” The Rough endoplasmic reticulum is made up of a series of connected flattened sacs that are part of a continuous membrane that folds to create thin layers around the Nucleus.
+The “ribosomes” are depicted as dozens of small red dots stuck to the Rough endoplasmic reticulum. A few are scattered throughout the rest of the cell and are called “Free ribosome”.
+Surrounding the Rough endoplasmic reticulum are the other various parts of the cell. Starting at the top and moving clockwise they are as follows:
+  * “Microtubule”: narrow, yellow, hollow tubes that criss-cross over each other with a web-like substance connecting them. They take up the top third of the cell.
+  * “Cytoplasm”: the fluid inside the cell, but outside the nucleus.
+  * “Lysosome”: small pink bean shapes found throughout the cell.
+  * “Smooth endoplasmic reticulum”: large blue ribbon like structure with many small folds. It takes up a full side of the cell.
+  * “Golgi apparatus”: a stack of flat sacs that appear like a wide folded green ribbon. It takes up a fourth of the bottom side of the cell.
+  * “Mitochondrion”: pink slipper shaped structure with two layers. The outer layer is smooth, and the inner layer has many folds. They are located throughout the cell.
+----
+This next example is from the same webinar, and is a good example of a top to bottom breakdown.
+{{ :public:nnels:etext:images:alt_text_examples:cell_labelled.png?400 |}}
+[Alt-Text] A labelled diagram of the extracellular matrix of an animal cell. See link below for a long description.
+[Long Description] The labelled sections of the ECM are as follows from top to bottom:
+  * “Extracellular Fluid”: fills the space outside the cell above the plasma membrane.
+  * “Glycoprotein complex with long polysaccharide”: long thin green string with dozens of delicate feather like appendages. The strings weave and wrap around the Collagen Fiber
+  * “Collagen Fiber”: Thicker smooth purple striped strings that float across the extracellular fluid
+  * “Connecting glycoprotein”: Small purple worm like structures that link the Collagen Fiber to the Integrins
+  * “Integrins”: double purple bean like shapes clustered together and embedded in the Plasma Membrane
+  * “Plasma membrane”:  the outer membrane of the cell. Described in Figure 4.2.
+  * “Microfilaments of cytoskeleton”: sets of twisted orange two-strand strings that connect to the plasma membrane
+  * “Cytoplasm”: fluid that fills the space within the cell below the plasma membrane.
+----
+This next example is from the same webinar. It features an insert image, and is a good example of leaving out some details to focus on the main parts of the image.
+{{ :public:nnels:etext:images:alt_text_examples:bio_insert.png?400 |}}
+[Alt-Text] Labelled diagram of plant cell walls with a zoomed in diagram of the plasmodesmata (a channel between the cells). See the link below for a long description.
+[Long Description] Plant cells stick together in a honey-comb pattern. The center of each cell has a clear sac like area labelled: “Vacuole”. The plant cell walls are beige and thick with a thinner and darker outer membrane.
+The plasmodesmata (channels) are depicted all around the cell walls, as holes in the outer walls of the cells, and as small tunnels between the connected cells.
+The zoomed in area shows the details of a Plasmodesmata in the cellular wall. It is labelled from top to bottom as follows:
+  * “Pectin layer between cells”: is a dark vein in the center of the cellular wall.
+  * “Primary cell wall”: is located on either side of the Pectin Layer
+  * “Secondary cell wall”: is located on either side of the Primary Cell wall and is three times thicker.
+  * “Plasmodesmata”: a tube like channel that passes through the wall from one cell to the other.
+  * “Plasma membrane”: is located around the Secondary Cell Wall and is a thin darker layer.
+  * “Cytosol”: liquid inside the cell that can move through the channels.
 ----

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