I Never Metatarsal I Didn't Like

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→ 22 May 12 at 2 pm decaturjim:

Meet Dave. He is made of things, as are you and I

Our bodies are comprised of a vast array of elements, with oxygen, carbon, hydrogen, and nitrogen remaining the most abundant. But there are many other chemical elements present, all contributing to our health and longevity. The nifty figure above lists each element that has been isolated from the human body in the order of decreasing mass.

This chart is based on the work of Ed Uthman, who derived the data from The Elements, by John Emsley.

(via Starts With a Bang)

(via polymath4ever)

decaturjim:

Meet Dave. He is made of things, as are you and I
Our bodies are comprised of a vast array of elements, with oxygen, carbon, hydrogen, and nitrogen remaining the most abundant. But there are many other chemical elements present, all contributing to our health and longevity. The nifty figure above lists each element that has been isolated from the human body in the order of decreasing mass.
This chart is based on the work of Ed Uthman, who derived the data from The Elements, by John Emsley.
(via Starts With a Bang)

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→ 22 May 12 at 9 am (Source: kim-allen, via tookus)

tags: human anatomy anatomy bones human science

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→ 22 May 12 at 4 am

polymath4ever:

Nearsightedness (myopia) and farsightedness (hyperopia) are eye conditions caused by irregular cornea shape or eyeball length. Nearsightedness results from the cornea being too curved or the eyeball length being overlong, and farsightedness results from the cornea being too flat or the eyeball length being too short. Light focuses on a distance not on the retina, which if stimulated by light begins responses that result in one’s perception of an image of an object. In a nearsighted eye the light is focused before the retina, and in a farsighted eye the focal point is beyond the retina. These conditions are often made less bothersome with glasses, a concave lens appropriate for nearsightedness and a convex lens farsightedness. In the former light entering the eye is spread as concave lenses have negative focal lengths, and in the latter the light is focused more as convex lenses have positive focal lengths (looking at the ray diagrams, a concave lens is a diverging lens, and a convex lens is a converging lens); a concave lens has negative optical or focusing power and a convex lens positive, and these combine with the eye’s optical power to produce sharper images.

tags: anatomy human anatomy optics eyes human science

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→ 20 May 12 at 11 am decaturjim:

Explore The Human Microbiome

The human microbiome refers to all of the microbial organisms that reside in the body including bacteria, fungi, and archaea. Notably, the human body contains over 10 times more microbial cells than human cells.

To illustrate the diversity of these ‘body bugs’, Scientific American have profiled this impressive, interactive map of the key microorganisms commonly identified in the human body and their predominant location.

Interest in the human microbiome has increased in recent years, following reports that the type and number of microorganisms seem to play a role in the onset of several medical conditions including obesity, cancer, and diabetes.

(via freshphotons)

(via polymath4ever)

tags: science human anatomy microbiome biology human biology

decaturjim:

Explore The Human Microbiome
The human microbiome refers to all of the microbial organisms that reside in the body including bacteria, fungi, and archaea. Notably, the human body contains over 10 times more microbial cells than human cells.
To illustrate the diversity of these ‘body bugs’, Scientific American have profiled this impressive, interactive map of the key microorganisms commonly identified in the human body and their predominant location.
Interest in the human microbiome has increased in recent years, following reports that the type and number of microorganisms seem to play a role in the onset of several medical conditions including obesity, cancer, and diabetes.
(via freshphotons)

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→ 19 May 12 at 10 pm

tags: biology science anatomy human body human anatomy human biology anatomy facts science facts biology facts human anatomy facts

The cerebellum is the second largest portion of the brain.

It is situated beneath the occipital lobes of the cerebrum, is divided into two hemispheres, and is responsible for the coordination of skeletal muscle movement and keeping us balanced.

(Source: humananatomyfacts)

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→ 18 May 12 at 2 pm

tags: human body human anatomy human biology anatomy anatomy facts biology biology facts science science facts cellular biology microbiology

There are two types of cell deaths:

1. Apoptosis

the process of programmed cell death (PCD) caused by biochemical events and controlled by a diverse range of cell signals that originate either extra- or intracellularly.

2. Necrosis

unlike apoptosis, necrosis is the traumatic, premature death of cells in living tissue. It’s usually caused by extracellular factors like infections, toxins, or trauma.

(Source: humananatomyfacts)

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→ 17 May 12 at 7 pm Histologic cross section of embryonic foot of mouse (Mus musculus) in 15.5 day of its development. There are still cells between fingers. (Full development of mouse lasts 27 days.)

tags: human body human biology human anatomy human anatomy facts biology biology facts science science facts anatomy anatomy facts

Histologic cross section of embryonic foot of mouse (Mus musculus) in 15.5 day of its development. There are still cells between fingers. (Full development of mouse lasts 27 days.)

♥ 39
→ 17 May 12 at 2 pm There are two basic types of cells: Prokaryotes and and Eukaryotes.

The prefix “pro-” means “before” and the suffix “-karyotic” comes from the Greek word “karyose” which means “kernel” (as in a kernel of grain), and refers to the nucleus of a cell; thus the term prokaryotic means before nuclei. Basically, any cell that lacks a membrane-bound nucleus is classified as a prokaryote. Usually, most prokaryotic cells are also bacteria and-unlike eukaryotic cells- are not dependent on oxygen and contain few determinable internal structures.

On the other hand, the prefix “eu-” means “true” or “good” and again the suffix “-karyotic” refers to the nuclei of cells; thus the term eukaryotic means possessing a true nucleus. Eukaryotes (more formally known as Eukarya or Eukaryota) contain complex structures (organelles like mitochondria, chloroplasts, and the Golgi apparatus) enclosed within membranes and are usually much larger than Prokaryotes. Basically, all species of large complex organisms are eukaryotes. This includes animals, plants and fungi, although most species of eukaryote are protist microorganisms.

tags: human anatomy human anatomy facts biology biology facts science science facts microbiology cellular biology prokaryotes eukaryotes