Homework Help

Can you fill in the blanks to complete the levels of organization for a human?...

user profile pic

mrshdodsoncoyote | High School Teacher | eNoter

Posted June 11, 2013 at 4:30 PM via web

dislike 1 like

Can you fill in the blanks to complete the levels of organization for a human?

organelles,__________,__________,__________ __________,organism

1 Answer | Add Yours

user profile pic

mvcdc | Student, Undergraduate | (Level 1) Associate Educator

Posted June 11, 2013 at 9:47 PM (Answer #1)

dislike 1 like

The level of organization for a human is as follows:

organelles < cells < tissues < organs < organ systems < organism

  • Organelles are specialized systems or units found inside a cell. Some examples include the ribosome which produces proteins, and mitochondria which provides cell energy.
  • A cell is the basic unit of life. It consists of organelles. A cell is the smallest unit of life that is classified as a living thing.
  • A group of cells constitute a tissue. It is a group of similar types of cells - from the same origin - that carry out a special/specific function. Examples of tissues are muscles and connective tissues (e.g. blood).
  • A group of tissues will constitute an organ. It is a group of tissues that make up a structure that serves a function. An example is the heart - it pumps blood supply throughout the body. A heart consists of nervous tissues, muscle tissue, and blood tissue.
  • When a group of organs function, usually in succession, towards a specific goal, you have an organ system. For example, the respiratory system - which consists of the lungs, trachea, nasal cavity, diagphram, among others - is responsible for the gas exchange (oxygen-carbon dioxide) in mammals. 
  • Lastly, an organism is any living system whose basic unit is a cell, and consists of tissues, organs, and organ systems to function and survive. [Here, we consider multicellular organisms. Otherwise, the level of organization will end at a cellular level - unicellular means single cell.]

Sources:

1 Reply | Hide Replies

user profile pic

mrshdodsoncoyote | High School Teacher | eNoter

Posted June 12, 2013 at 1:20 PM (Reply #1)

dislike 0 like

Very Good

 

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes