Molecules contain water, sugar, carbohydrates, lipids and proteins that form together to create cells What do Cells form in the structural organization of the human body? A tissue is a group of many similar cells (though sometimes composed of a few related types) that work together to perform a specific function. Organ system level– One or more organs work in unison to accomplish a common purpose. Each organ performs one or more specific physiological functions. Higher levels of organization are built from lower levels. Organs that work together are grouped into organ systems. Atoms, particles of matter, combine to form molecules, such as water. Tissue Level. 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. Assigning organs to organ systems can be imprecise since organs that “belong” to one system can also have functions integral to another system. Organ Systems of the Human Body (continued). The human body is composed of a group of systems which are the digestive system, the respiratory system, the urinary system, the circulatory system, the nervous system and the reproductive system.. (I.C.1) 1. An organ is an anatomically distinct structure of the body composed of two or more tissue types. 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. Organs and Organ Systems After tissues, organs are the next level of organization of the human body. 1. 1. This book covers eleven distinct organ systems in the human body ([link] and [link]). In humans, as in all organisms, cells perform all functions of life. DESCRIBE THE LEVELS OF STRUCTURAL ORGANIZATION THAT MAKEUP THE HUMAN BODY 1.1.1. Made of atoms 2. Levels of Structural Organization of the Human 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. Cells form together to create tissues 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). Levels of Structural Organization of the Human Body. Basic unit of matter 3. There are many different organs in the body: the liver, kidneys, heart, even your skin is an organ. Atom 2. All living structures of human anatomy contain cells, and almost all functions of human physiology are performed in cells or are initiated by cells. 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. Organs are the next level of organization in the body. 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. The next level of organization in the body is that of the organ. It comprises a head, neck, trunk (which includes the thorax and abdomen), arms and hands, legs and feet.. Figure 1.1. The human body has 6 main levels of structural organization. The female ovaries and the male testes are a part of which body system? Organs and Organ Systems. An organ is a structure that consists of two or more types of tissues that work together to do the same job. Why or why not? By the end of this section, you will be able to: 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. Skin, the largest organ in the body, is shown in Figure 4. A tissue is a group of many similar cells (though sometimes composed of a few related types) that work together to perform a specific function. The organism level is the highest level of organization. The tissue level. Molecules are the chemical building blocks of all body structures. Atoms are made up of subatomic particles such as the proton, electron and neutron. Molecule 4. Tissue is composed of groups of cells that possess a common function. See below Figure 1.1. And reproductive systems combine to form molecules, proteins, and sugars found in things. 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