Levels of Organization (anatomy)
A population of bees shimmers in response to a predator.Biological organization, is the hierarchy of complex biological structures and systems that define life using a reductionistic approach. The t...
Levels of Organization (anatomy) - Wikipedia
Life saving leaves.
A spinach leaf has been transformed into beating human heart tissue.
The History of Urbanization, 3700 BC - 2000 AD
This map visualizes the history of urban settlements over 6000 years.
Why are people so often wrong about their own countries?
People in 33 nations polled by the latest Ipsos Mori survey often seem clueless on wealth, immigration and other factors. Our new international survey across 33 countries shows just how wrong the worl...
Tissue (biology)
In biology, tissue is a cellular organizational level intermediate between cells and a complete organ. A tissue is an ensemble of similar cells from the same origin that together carry out a specific...
Tissue (biology) - Wikipedia
Organ (anatomy)
In biology, an organ (or viscus) is a collection of tissues joined in a structural unit to serve a common function. In anatomy, a viscus /ˈvɪskəs/ is an internal organ, and viscera is the plural form....
Organ (anatomy) - Wikipedia
Organ systems
A biological system is a complex network of biologically relevant entities. As biological organization spans several scales, examples of biological systems are populations of organisms, or on the orga...
Biological system
A biological system is a complex network of biologically relevant entities. As biological organization spans several scales, examples of biological systems are populations of organisms, or on the orga...
Biological system - Wikipedia
Population
A population is a summation of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding.In ecology, the population of a ce...
Population - Wikipedia
Community
A community is a social unit of any size that shares common values. Although embodied or face-to-face communities are usually small, larger or more extended communities such as a national community, ...
Community - Wikipedia
Biological systems engineering
Biological Systems Engineering or Biosystems Engineering is a broad-based engineering discipline with particular emphasis on biology and chemistry. It can be thought of as a subset of the broader noti...
Ovary (plants)
In the flowering plants, an ovary is a part of the female reproductive organ of the flower or gynoecium. Specifically, it is the part of the pistil which holds the ovule(s) and is located above or bel...
Ovary (plants) - Wikipedia
Human musculoskeletal system
The human musculoskeletal system (also known as the locomotor system, and previously the activity system) is an organ system that gives humans the ability to move using their muscular and skeletal sys...
Human musculoskeletal system - Wikipedia
Sensory system
A sensory system is a part of the nervous system responsible for processing sensory information. A sensory system consists of sensory receptors, neural pathways, and parts of the brain involved in s...
Sensory system - Wikipedia
Pancreas
The pancreas /ˈpæŋkriəs/ is a glandular organ in the digestive system and endocrine system of vertebrates. In humans, it is located in the abdominal cavity behind the stomach. It is an endocrine glan...
Pancreas - Wikipedia
Lung
The lung is the essential respiration organ in many air-breathing animals, including most tetrapods, a few fish and a few snails. In mammals and the more complex life forms, the two lungs are located ...
Lung - Wikipedia
Liver
The liver is a vital organ of vertebrates and some other animals. In the human it is located in the upper right quadrant of the abdomen, below the diaphragm. The liver has a wide range of functions, i...
Liver - Wikipedia
Kidney
The kidneys are bean-shaped organs that serve several essential regulatory roles in vertebrates. They remove excess organic molecules from the blood, and it is by this action that their best-known fun...
Kidney - Wikipedia
Heart
The heart is a muscular organ in both humans and other animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, and also assis...
Heart - Wikipedia
Bone
A bone is a rigid organ that constitutes part of the vertebral skeleton. Bones support and protect the various organs of the body, produce red and white blood cells, store minerals and also enable mob...
Bone - Wikipedia
Perimysium
Perimysium is a sheath of connective tissue that groups muscle fibers into bundles (anywhere between 10 to 100 or more) or fascicles.Recent advances in muscle physiology suggest that the perimysium pl...
Vascular tissue
Vascular tissue is a complex conducting tissue, formed of more than one cell type, found in vascular plants. The primary components of vascular tissue are the xylem and phloem. These two tissues trans...
Vascular tissue - Wikipedia
Gland
A gland is an organ in an animal's body that synthesizes a substance such as hormones for release into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine...
Gland - Wikipedia
Brain
The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals—only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfis...