Átomos y Células

The Hierarchical Organization of Life

Life is organized in a hierarchical manner. increasing in complexity from its basis in atoms, molecules and then in sequence to organelles, cells, tissues, organs, organs systems, organisms, populations, communities, ecosystems and the biosphere.

PearsonCustom | The Hierarchical Organization of Life

The Hierarchy of Life

YouTube | Bozeman Science

Order of life: Quark, Atom, Molecule, Organelle, Cell, Tissue, Organ, Organ Sys, Organism?

I’m teaching my son biology and want to confirm the order of life. Is the order and desc correct? Quark: Simply energy. Can’t be seen under any microscope. Atom: Made from quarks. Has protons, neutrons. These make molecules. Molecule: These are made from Atoms. Examples of molecules are: Hydrogen,…

UPDATE: Would heart muscle, bicep muscle and tricep muscle be made of the same TISSUE? If so, how does the body know to send some tissue to the bicep versus tricep? Also, how then do you explain the different shapes and strengths of the muscles if they have the same tissues?

Yahoo Answers | Order of life: Quark, Atom, Molecule, Organelle, Cell, Tissue, Organ, Organ Sys, Organism?


Preparado por Patricio Barros

A simple vista puede verse que los carbones se componen de restos vegetales. Los restos fósiles de conchas de moluscos marítimos crean con frecuencia capas calizas. Pero si observamos al microscopio las calizas, la creta, la diatomita y muchas otras rocas de las llamadas sedimentarias, veremos que con frecuencia están constituidas en su totalidad por restos de esqueletos de organismos de dimensiones microscópicas.

En una palabra, en la Geología hace mucho que se reconoce el inmenso papel de los organismos que pueblan la esfera terrestre en todos los procesos que se verifican en la superficie de la Tierra. La sustancia viva toma más o menos parte en los procesos geoquímicos tales como formación de rocas, concentración o dispersión de distintos elementos químicos, precipitación de substancias del agua, formación de calizas a base de los esqueletos calcáreos de los organismos.

Pero no todos los organismos marinos tienen el esqueleto de cal. En algunos, por ejemplo, en las esponjas, el esqueleto es de sílice.

Pero lo más esencial es que en el proceso vital todos los organismos de la Tierra, vegetales y animales, extraen, absorben o se alimentan y de nuevo desprenden una cantidad enorme de diversas substancias.

La velocidad de este proceso es especialmente grande en los organismos más diminutos: bacterias, algas simples y otros organismos inferiores. Esto está en relación con la gran velocidad de su multiplicación.

Libros Maravillosos | LOS ÁTOMOS EN LA CÉLULA VIVA

Building the Body: From Atoms to Organs

Your body, as a whole, is one organism. However, many, many parts make up that whole. As you consider the various levels of the body (see Figure 1), you understand that a large number of parts are within parts. It’s akin to looking at a pine tree. At first, you notice the entire tree — a whole organism. However, as you look closer, you notice the branches. Looking at the twigs on the branches, you notice each needle on the twigs.

Thousands, if not millions, of needles exist on that one single pine tree. The same analogy holds for the human body or the body of any animal. First, you notice the entire body. Next, you see that the entire body is made up of parts and organs, and each of those organs is made up of a variety of tissues. And if, as a pathologist does, you examine a magnified sample of one of the human body’s tissues under a microscope, millions of cells become visible. Yet you can turn up the magnification for an even closer look: Cells contain molecules that are made up of even smaller components called atoms.

For Dummies | Building the Body: From Atoms to Organs

The Hierarchical Organization of Life

a learning initiative

You probably have a general understanding of how the human body works but do you fully comprehend its intricate functions? Our website is designed to aid students in understanding the fundamentals of the human body. By approaching anatomy and physiology in an organized way, you will be able to better understand and present the material provided.

Soon, you will begin to think and speak in anatomical terms and be able to integrate the knowledge you gain during your study’s in A& P. The human body is an intricate organism capable of extraordinary things!

Topics covered include:

Organization of the body

  • The human body: orientation
  • Human chemistry
  • Cells
  • Tissue

Covering, support, and movement of the body

  • The integumentary system
  • Bones and skeletal tissues
  • The skeleton
  • Joints
  • Muscles and muscle tissue
  • The muscular system

Regulation and integration of the body

  • Fundamentals of nervous tissue and the nervous system
  • The central nervous system
  • Reflex activity and the peripheral nervous system
  • The autonomic nervous system
  • Special senses
  • The endocrine system

Maintenance of the body

  • Blood
  • The cardiovascular system (heart and blood vessels)
  • The lymphatic system
  • The immune system
  • The respiratory system
  • The digestive system
  • Nutrition, metabolism, and body temperature regulation
  • The urinary system
  • Fluid, electrolyte, and acid-base balance


  • The reproductive system
  • Pregnancy and human development
  • Heredity

Anatomy & Physiology | A&P: Levels of structural organization