Cells and Tissues: ANAT1160 Unit 3
Your body is built from trillions of cells, and every one of them is running its own small factory while you sit still.
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Cells and Tissues: ANAT1160 Unit 3
This episode is a focused ANAT1160 review of Unit 3, cells and tissues. It works through the unit's seven objectives: the parts of a cell and the function of each, how material crosses the cell membrane, how a cell reproduces and how mitosis differs from meiosis, the six cellular growth changes, the four basic tissue types, the connective tissues by name, and the difference between mucous and serous membranes. It closes with retrieval questions and answers, so it works as a review right before a quiz.
Keep the structure-to-function link this review always uses. A sheet of cells packed tightly together with no blood supply of its own is built to be a barrier, which is why epithelial tissue covers and lines. Cells few and far apart, sitting in a matrix they make themselves, are built to bind and carry, which is why connective tissue supports, cushions, and transports. The inner membrane of a mitochondrion is folded into cristae because those folds buy the surface area the reactions need. Collagen fibers packed parallel are what take the pull on a tendon. Two layers of serous membrane with fluid between them exist so that organs slide instead of rubbing.
Before a quiz, have these ready: the parts of a cell with one job each; the passive processes, diffusion, facilitated diffusion, osmosis, and filtration, set against the active ones, the pumps, endocytosis, and pinocytosis; what water does in an isotonic, a hypotonic, and a hypertonic solution; two differences between mitosis and meiosis; the six cellular growth changes; the four tissue types and one function each; the connective tissue groups with their examples; and what separates a mucous membrane from a serous one.
The review follows the uploaded Cells, Tissues and the Integumentary System deck, Unit 3 outcomes 3.1 to 3.7. That deck's own labelled cell figure supplies the parts list — cell membrane, cytoplasm, nucleus, nucleolus, mitochondrion, ribosomes, rough and smooth endoplasmic reticulum, Golgi apparatus, lysosome, microtubules, centrioles, and cilia — and the chapter the deck cites supplies what each part does: OpenStax Anatomy and Physiology 2e, Chapter 3, sections 3.1 to 3.6 for the cell and its transport, and Chapter 4, sections 4.1 to 4.6 for the tissues, the membranes, and how tissues change in health and disease. The chapter text read here is the open-licensed University of Hawai'i Anatomy and Physiology, modified from OpenStax under a Creative Commons Attribution licence, with its tissue chapter for the tissue and membrane detail. The deck's practice pages for this unit carry no answer key, so the retrieval questions are this episode's own, each answer traceable to the deck or to the chapters it cites.
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