CELLS alive! Puzzle Page
Jigsaw Puzzles
Try your hand at assembling the following jigsaw puzzles created with images from CELLS alive!. Each puzzle is 32 pieces and generally takes a few minutes to solve.
Cells
Notice that the larger cube has more surface area and more volume but less surface area for each cubic centimeter of volume.
B Cells
BCRs bind soluble antigens (like diphtheria toxoid, the protein introduced into your body in the DTP vaccine).
The bound antigen molecules are engulfed into the B cell by receptor-mediated endocytosis.
Cells range in size from small bacteria to large, unfertilized eggs laid by birds and dinosaurs. The realtive size ranges of biological things is shown in Figure 1. In science we use the metric system for measuring.
Cells Alive! Very interesting site with new features each month.
The Nanoworld Image Gallery Lots of interesting pics and links for microscopes.
History of the Light Microscope Descriptive title says it all.
Cells in Motion - In multicellular tissues, such as those found in animals and humans, individual cells employ a variety of locomotion mechanisms to maneuver through spaces in the extracellular matrix and over the surfaces of other cells.
Somatic Cells
A somatic cell is any cell of the body except sperm and egg cells. Somatic cells are diploid, meaning that they contain two sets of chromosomes, one inherited from each parent.
cells that cover the surface of the body and line its cavities.
Please contribute to this project, if you have more information about this term feel free to edit this page ...
All cells including the prokaryotes, have a cell (plasma) membrane. Prokaryotes with few exceptions also have a cell wall containing a unique peptidoglycan, a biomolecule made of amino acids and sugars.
New cells that form at the posterior pole of the Drosophila egg that give rise to the germ cells of the adult
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
The migration of different cell types, such as leucocytes and tumour cells, involves cellular strategies to overcome the physical resistance of three-dimensional tissue networks, ...
Sizes of cells, viruses, and other small things
Biology is a visually rich subject area. However, many of the most interesting biological events and structures are smaller than the unaided human eye can see.
Cells are the Starting Point
All living organisms on Earth are divided in pieces called cells. There are smaller pieces to cells that include proteins and organelles. There are also larger pieces called tissues and systems.
Cells
Chondrocytes are the only cells found in cartilage. They are responsible for the secretion and maintenance of the matrix.
Cells: The basic units of life. All living organisms are a collection of cells. Chromosomes: The self-replicating genetic structures of cells.
CellServ - Self-contained kits for use in genetics laboratory activities and classroom instruction.
T cells belong to a group of white blood cells known as lymphocytes, and play a central role in cell-mediated immunity.
B cells: A major family of small lymphocytes that are responsible for antigen-specific humoral immunity as part of the adaptive immunity. Their antigen receptors are surface immunoglobulins (antibodies).
sex cells
gametes. In the male it is the sperm and in the female it is the egg.
germ cells: The cells of the body involved in reproduction. Sperm of the male and eggs of the female are formed from germ cells.
germ cells
[L. germinare, to bud]
Gametes or the cells that give rise to gametes.
germination ...
Hair Cells."The hair cells are short columnar cells; their free ends are on a level with the heads of Corti's rods, and each is surmounted by about twenty hair-like processes arranged in the form of a crescent with its concavity directed inward.
guard cells -- Pair of cells which surround a stomate and regulate its size by altering their shape.
gymnosperm -- n. A plant that produces seeds, which are not enclosed; includes any seed plant that does not produce flowers.
Hair cells Specialized neurons inside the cochlea of the inner ear; hair cells use a connected bundle of stereocilia to detect motion and initiate the hearing signal-transduction pathway.
bottle cells - epithelial cells found at the initial site of gastrulation, lining the initial archenteron, that temporarily become bottle-shaped; they maintain contact with the outer surface of the embryo, ...
Somatic cells: Cells of body tissues other than the germline.
Splicing: See gene splicing.
StarLinkTM: An insect-resistant variety of corn that was approved for animal feed only, not labeled for human consumption.
Cells derived from fetal tissue have been used to generate so-called embryonic stem cells.
Cells - What Is A Cell Membrane?
Found in both plant and animal cells, the cell membrane is the outside wall of a cell. In plant cells, it is a second wall, and is found just inside the main cell wall.
Cells in culture, stained for keratin (red) and DNA (green)
Cell theory states that the cell is the fundamental unit of life, and that all living things are composed of one or more cells or the secreted products of those cells (e.g. shells).
cells present in the choroid plexus of the central nervous system which participate in the production of spinal fluid
Source: User Submission
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Cells specialized to transmit electrical nerve impulses, to carry information from one part of the body to another ...
Cells have a watery medium called cytosol that contains the necessary factors for their survival.
All cells contain a range of nucleases, most have fairly broad preferences as to where they will attack nucleic acids.
bone cells The hard, rigid form of connective tissue constituting most of the skeleton of vertebrates; composed chiefly of calcium salts. Also called bone (osseous) tissue.
Bone os, G. osteon = bone.
glial cells- supporting cells of the nervous system, including oligodendrocytes and astrocytes in the vertebrate central nervous system and Schwann cells in the peripheralnervous system ...
3. The cells have different surface areas and they have different volumes (amounts of materials inside). Calculate the volume of each cube. Volume = length x width x height.
Somatic cells: Any cell in the body except gametes and their precursors.
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3 × 108 cells per ml
Mutation rate
10-8 mutations per gene per individual per generation ...
Clone
Cells derived from a single cell and thus expected to be genetically identical.
Cloning
The production of multiple, genetically identical molecules of DNA, cells, or organisms.
Adult stem cells Cells that can renew themselves and differentiate into a limited number of specialized cell types. They replace and renew damaged tissues.
- The use of cells or biological molecules in an electronic system to detect specific substances. Consists of a biological sensing agent coupled with a microelectronic circuit.
Biosynthesis
- Production of a chemical by a living organism.
In eukaryotic cells, the word transformation is normally used only to describe a process that causes the cell to become malignant (cancerous).
Live or fixed cells are labeled by fluorescent dyes. Individual cells are sorted based on their fluorescent markers. Frequently used to for purifying cells based on cell surface protein expressions, and for cell cycle studies.
Other Resources ...
Sperm and egg cells and their precursors. Germ cells are haploid and have only one set of chromosomes (23 in all), while all other cells have two copies (46 in all).
Germ line ...
Germline The cells which are in direct mitotic line of descent from the zygote to its gametes. As distinct from somatic cells.
Early cells that serve as the mitotic progenitor of an organ in organogenesis.
Related Terms:
Mitosis ...
Where do Stem Cells Come From?
The most widely known source of stem cells is human/animal embryos, prompting controversy over stem cell research based on bioethics and the view that life begins at conception.
A class of antibiotics that kills bacterial cells. Bacteriophage (phage or phage particle). A virus that in- fects bacteria. Altered forms are used as vectors for cloning DNA. Bacteriostat.
Amniocentesis -- prenatal diagnosis method using cells in the amniotic fluid to determine the number and kind of chromosomes of the fetus and, when indicated, perform biochemical studies. Amniocyte -- cells obtained by amniocentesis.
Mitochondria - genetically independent organelles that produce energy for the cells along their many internal folds, called cristae
Mitosis - cellular division that yields two identical cells from one cell through a five-step process ...
Chromosome Structures found in the nucleus of cells composed of DNA and proteins. Normally humans have 46 chromosomes in each cell, 23 from each parent. Of these, 22 are autosomes and 1 is a sex chromosome.
The most frequent process of nuclear division (karyokinesis) in cells that produces daughter cells that are genetically identical to each other and to the parent cell.
A single set of chromosomes (half the full set of genetic material), present in the egg and sperm cells of animals and in the egg and pollen cells of plants (Gk. haploos, single). Human beings have 23 chromosomes in their reproductive cells.
Oncogene: A gene in a tumor virus or in cancerous cells which, when transferred into other cells, can cause transformation (note that only certain cells are susceptible to transformation by any one oncogene).
CLONE - Describes a large number of cells, viruses, or molecules which are identical and which are derived from a single ancenstral cell, virus or molecule.
annual ring - a more or less concentric circle, a cross-section of a tree stem; usually each consists of large cells oriented towards the center of the stem that were produced in the spring followed by progressively smaller cells toward the bark ...
The first broad group consists of disciplines that study the basic structures of living systems: cells, genes etc.
An immunoelectron-microscopy procedure in which cells are chemically fixed and infiltrated with cryoprotectant before they are frozen by being plunged into liquid nitrogen.
Genes: The hereditary material coded in cells that determine how an organism will look and behave. A gene is a single unit located on a chromosome and is thereby passed from one generation to the next.
Meiosis: the process of cell division in which a single cell produces four daughter cells each of which contains half of the number of chromosomes of the parent cell.
 See also: Trans, Site, Organ, Cell, Protein
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