What is the most complex body structure?

The human brain is a 3-pound (1.4-kilogram) mass of jelly-like fats and tissues—yet it’s the most complex of all known living structures.

Which is the least complex structure?

In order, from least complex to most complex:

• cells.
• tissues.
• organs.
• organ systems.
• organism.

What are the levels of organization from most simple to most complex?

order from simplest to most complex: Organism, Tissue, Organ, Cell, and Organ System. five levels of organization in the human body in order from simplest to most complex: Organism, Tissue, Organ, Cell, and Organ System.

What is the most simple to most complex?

The ranking from simplest to most complex: cell, tissue, organ, organ system, organism, biosphere.

What is the most complex?

The brain is the last and grandest biological frontier, the most complex thing we have yet discovered in our universe. It contains hundreds of billions of cells interlinked through trillions of connections. The brain boggles the mind.

Which level is the most complex?

Summarizing: The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.

What is the largest and most complex type of cell?

The largest and most complex prokaryotes are the cyanobacteria, bacteria in which photosynthesis evolved. The structure of a typical prokaryotic cell is illustrated by Escherichia coli (E. coli), a common inhabitant of the human intestinal tract (Figure 1.6).

Which level of biological organization is the most important why?

the biosphere
At the highest level of organization, the biosphere is the collection of all ecosystems, and it represents the zones of life on earth. It includes land, water, and even the atmosphere to a certain extent.

What is the highest level of organization under which the heart may be classified?

organ
The level of organization that the heart would be classified as is b) organ. The heart is an organ that is made of cardiac tissue, and cardiac tissue…

How is the human body organized from smallest to largest structure?

The levels of organization in the human body consist of cells, tissues, organs, organ systems and finally the organism. The smallest unit of organization is the cell. The next largest unit is tissue; then organs, then the organ system. Finally the organism, is the largest unit of organization.

What are the structural levels of organization in the body?

It is convenient to consider the structures of the body in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms and biosphere (Figure 1.3).