3D Models of the Human Anatomy Different organs can work together to perform a common function, like how the parts of your digestive system break down food. We refer to an integrated unit as an organ system. Groups of organ systems work together to make complete, functional organisms, like us!
Science Education - Research & Training - NIH NIH Home > Research & Training Resources for Students Featured Site: NIAMS Kids Pages Frog Life Cycle Recycled Craft This recycled craft is perfect for reviewing a frog's life cycle with kids! It is easy for the children to transform the tadpole into a frog as they retell the process in their own words! This post contains Amazon affiliate links. If you click through to Amazon from this page and purchase anything, we will get a small profit for referring you without any additional cost to you! Tree of Life Web Project The Tree of Life Web Project (ToL) is a collaborative effort of biologists and nature enthusiasts from around the world. On more than 10,000 World Wide Web pages, the project provides information about biodiversity, the characteristics of different groups of organisms, and their evolutionary history (phylogeny). Each page contains information about a particular group, e.g., salamanders, segmented worms, phlox flowers, tyrannosaurs, euglenids, Heliconius butterflies, club fungi, or the vampire squid. ToL pages are linked one to another hierarchically, in the form of the evolutionary tree of life. Starting with the root of all Life on Earth and moving out along diverging branches to individual species, the structure of the ToL project thus illustrates the genetic connections between all living things.
Remarkable animal and plant life cycles - science(2,3,4) - ABC Splash - Add this to your favourites Remarkable animal and plant life cycles Find out about animals such as mammals that give birth to live young. Find out what's special about marsupials and the strange monotremes.
Animal Adaptations Purpose To expand students’ knowledge of animal features and behaviors that can help or hinder their survival in a particular habitat. Context Fighting infection with vaccines - Science (9) - ABC Splash - Overview Explore historical and modern efforts to battle human infectious diseases. Watch re-enactments of the experiments of Edward Jenner, who pioneered vaccination, and of Louis Pasteur's work showing how microbes cause infection. Peer down the microscope to see the microbial world that wreaks havoc on human health. Meiosis: An Interactive Animation Diploid Cell (2N): From a preceding mitotic division, the Oogonium (Spermatogonium) enters meiosis with DIPLOID (2N) chromosomes but TETRAPLOID (4N) DNA. Chromosomes then duplicate to produce SISTER CHROMATIDS (or HOMOLOGOUS DYADS). Prophase I: Dyad pairs align to create "TETRADS", non-sister chromatids connect and trade sections at a "CHIASMA", a process called "CROSSING OVER".
The Biology Project: Cell Biology en español Cell Membranes Learn that membranes are fluid, with components that move, change, and perform vital physiological roles as they allow cells to communicate with each other and their environment. Cell Signaling Learn that living organisms constantly receive and interpret signals from their environment. Cells of multi-cellular organisms also receive signals from other cells, including signals for cell division and differentiation. Plants - Interactive Science Games and Activities plants A plant is a living thing. A plant needs light, warmth, water and nutrients to grow well. Roots take up water and nutrients from the soil.
How plants work - Science (4) - ABC Splash - Overview Plants are the only living things that can make their own food. They do this during the day while it's light, using a process called photosynthesis, which uses carbon dioxide and produces oxygen. During the day and night plants take in oxygen and release carbon dioxide through respiration. Discover just how important plants are to life on Earth. Find out how we can help plants survive and thrive.