The Basic Structural and Functional Unit of Life- The Cell

Video What is the structural and functional unit of life

Tissues, organs, organ systems and organisms

Read more: Single-celled (unicellular) organisms may function independently, but the cells of multicellular organisms depend on each other and are organized into five different levels to coordinate specific functions of the organism. them and carry out all of the biological processes of life.

• Cell. The cell is the basic structural and functional unit of all life. Examples are red blood cells and nerve cells.
• Tissue. Tissues are groups of cells that share the same structure and function and work together. There are four types of human tissue: connective, connecting tissues; epithelium, pathways and protection of organs; muscles, contract for movement and support; and nerves, which respond and respond to signals in the environment.
• Viscera. Organs are a group of tissues arranged in a particular way to support a common physiological function. Examples include the brain, liver and heart.
• Organ system. An organ system is two or more organs that support a particular physiological function. Examples are the digestive system and the central nervous system. There are 11 organ systems in the human body (Table 3.2.1).
• Creature. An organism is a complete living system capable of carrying out all the biological processes of life.

Table 2.2.1: Eleven organ systems in the human body and their major functions Organ systems Organ components Main functions Cardiac circulation, blood/lymphatic vessels, blood, lymph Transport nutrients and wastes. Digestion and absorption Endocrine all glands (thyroid, ovary, pancreas) Hormone production and release Immune white blood cells, lymphatic tissue, marrow Protects against foreign invaders Skin, nails, hair, sweat glands throughout the body Protects, regulates body temperature Skeletal, smooth and cardiac muscles Body movements Brains nerves, spinal cord, nerves Interprets and responds to stimuli Thyroid sex, genitals, reproductive and reproductive features, lungs, respiratory tract, nose, mouth, throat, trachea, gas exchange, tubes, tendons, ligaments, joints, structure and support, urinary kidneys, bladder, ureters save waste, water THANG BANGRead: What is the structural and functional unit of life

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