Examples of human organs include the brain, heart, lungs, skin, and kidneys. Organs that work together are grouped into organ systems. Each bacterium is a single cell. Example: DNA (Deoxyribonucleic acid) 5. 1.1 Describe the four basic human body structure units and their functions The four basic human body structures and their functions are as follows: • Cells • Tissues • Organs • Systems Cells Cells have been identified as the simplest unit of living matter that can maintain life. Tissue Level. The structure of the human body . We will begin with the simplest level within the structural hierarchy. A muscle consists of many muscle tissues bundled together and surrounded by epimysium, a tough connective tissue similar to cartilage. In fact, most organs contribute to more than one system. Human beings are arguably the most complex organisms on this planet. This layer allows nerves and blood to flow to the individual fibers. Chemical level – To study the chemical level of organization, scientists consider the simplest building blocks of … Each bacterium is a single cell. Organs are the next level of organization in the body. Basic unit of matter 3. An organ is an anatomically distinct structure of the body composed of two or more tissue types. Organ Systems of the Human Body (continued), Creative Commons Attribution 4.0 International License, Describe the structure of the human body in terms of six levels of organization, List the eleven organ systems of the human body and identify at least one organ and one major function of each. Basic Body Structure and Organization. Final MAST 1120 Cognitive (Knowledge) Describe structural organization of the human body. It is convenient to consider the structures of the body in terms of fundamental levels of organization that increase in complexity, such as (from smallest to largest): chemicals, cells, tissues, organs, organ systems, and an organism. An organ system is a group of organs that work together to perform major functions or meet physiological needs of the body. 1. An organ is a structure that consists of two or more types of tissues that work together to do the same job. This book covers eleven distinct organ systems in the human body (Figure 2 and Figure 3). Levels of Structural Organization of the Human Body. Even bacteria, which are extremely small, independently-living organisms, have a cellular structure. Made of atoms 2. Imagine billions of microscopic parts, each with its own identity, working together in an organized manner for the benefit of the total being. DESCRIBE THE LEVELS OF STRUCTURAL ORGANIZATION THAT MAKEUP THE HUMAN BODY 1.1.1. The female ovaries and the male testes are a part of which body system? Organ system level– One or more organs work in unison to accomplish a common purpose. Name the six levels of organization of the human body. Each organ performs one or more specific physiological functions. All living structures of human anatomy contain cells, and almost all functions of human physiology are performed in cells or are initiated by cells. Figure 1.1. All living structures of human anatomy contain cells, and almost all functions of human physiology are performed in cells or are initiated by cells. Cells 6. 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). A human cell typically consists of flexible membranes that enclose cytoplasm, a water-based cellular fluid together with a variety of tiny functioning units called organelles. Organs and organ systems represent the highest levels of the body's organization (Figure 1). Molecule 4. 1. In humans, as in all organisms, cells perform all functions of life. The Levels of Organization Structural Organization of the Human Body, Elements and Atoms: The Building Blocks of Matter, Inorganic Compounds Essential to Human Functioning, Organic Compounds Essential to Human Functioning, Nervous Tissue Mediates Perception and Response, Diseases, Disorders, and Injuries of the Integumentary System, Exercise, Nutrition, Hormones, and Bone Tissue, Calcium Homeostasis: Interactions of the Skeletal System and Other Organ Systems, Embryonic Development of the Axial Skeleton, Development and Regeneration of Muscle Tissue, Interactions of Skeletal Muscles, Their Fascicle Arrangement, and Their Lever Systems, Axial Muscles of the Head, Neck, and Back, Axial Muscles of the Abdominal Wall and Thorax, Muscles of the Pectoral Girdle and Upper Limbs, Appendicular Muscles of the Pelvic Girdle and Lower Limbs, Basic Structure and Function of the Nervous System, Circulation and the Central Nervous System, Divisions of the Autonomic Nervous System, Organs with Secondary Endocrine Functions, Development and Aging of the Endocrine System. View ANP 1105 Notes.docx from ANP 1105 at University of Ottawa. Assigning organs to organ systems can be imprecise since organs that “belong” to one system can also have functions integral to another system. But they also secrete hormones, as does the endocrine system, therefore ovaries and testes function within both the endocrine and reproductive systems. To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms and molecules. Each fiber is then wrapped in an endomysium, anot… … 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). In fact, most organs contribute to more than one system. Organ Systems of the Human Body. Molecules are the chemical building blocks of all body structures. http://cnx.org/contents/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@9.1, Describe the structure of the human body in terms of six levels of organization, List the eleven organ systems of the human body and identify at least one organ and one major function of each. The Organization and Structure of the Human Body The Organization and Structure of the Human Body The human body is made up of a complex structure of systems that all work together. Two or more atoms combine to form a molecule, such as the water molecules, proteins, and sugars found in living things. Before you begin to study the different structures and functions of the human body, it is helpful to consider its basic architecture; that is, how its smallest parts are assembled into larger structures. Can these organs be members of more than one organ system? A.Describe the six levels of organization of the body, anddescribe the major characteristics of each level. Organ Systems of the Human Body (continued). Levels of Structural Organization of the Human Body. There are many different organs in the body: the liver, kidneys, heart, even your skin is an organ. Chromosome, the microscopic threadlike part of the cell that carries hereditary information in the form of genes.A defining feature of any chromosome is its compactness. To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms and molecules. Levels of structural organization that make up the human body. For instance, the heart and blood vessels work together and circulate blood throughout the body to provide oxygen and nutrients to cells. Thus, the heart is an organ composed of all four tissues, whose function is to pump blood throughout the body. The organization of the body often is discussed in terms of six distinct levels of increasing complexity, from the smallest chemical building blocks to a unique human organism. (I.C.1) 1. In the human body, if we start from the smallest to the largest, then it would be: 1. Organs are the next level of organization in the body. All living structures of human anatomy contain cells, and almost all functions of human physiology are performed in cells or are initiated by cell. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of which are hydrogen, oxygen, carbon, nitrogen, calcium, and iron. In multicellular organisms, including humans, all cells, tissues, organs, and organ systems of the body work together to maintain the life and health of the organism. It comprises a head, neck, trunk (which includes the thorax and abdomen), arms and hands, legs and feet.. 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