There are four main types of tissue in the human body including muscle tissue, connective tissue, epithelial tissue, and nervous tissue. The human nervous system can relay electrochemical messages at a rate of 249 mph (400 km/hr). So, if an organ is damaged, it means the cells and cell structure in the organ are also damaged. The digestive system consists of a series of connected organs that together, allow the body to break down and absorb food, and remove waste. The pharynx (throat) is the transition area from the mouth to the esophagus. The male reproductive system includes the penis and the testes, which produce sperm. The main organs that function in the urinary system are the kidneys and bladder. Younger primary students may have little knowledge about internal bodily organs. … Learn vocabulary, terms, and more with flashcards, games, and other study tools. The nervous system controls both voluntary action (like conscious movement) and involuntary actions (like breathing), and sends signals to different parts of the body. Our bodies consist of a number of biological systems that carry out specific functions necessary for everyday living. Human anatomy and physiology are treated in many different articles. Cardiovascular system. Thank you for signing up to Live Science. Do humans have only five senses? These four basic cell types, together with their extracellular materials, form the fundamental tissues of the human body: (1) epithelial tissues, which cover the body’s surface and line the internal organs, body cavities, and passageways; (2) muscle tissues, which are capable of contraction and form the body’s musculature; (3) nerve tissues, which conduct electrical impulses and make up the nervous system; and (4) connective tissues, which are composed of widely spaced cells and large amounts of intercellular matrix and which bind together various body structures. The evolution of the human eyebrows is believed to have prevented the influx of sweat into the eyes. The function of skeletal muscle is to contract to move parts of the body closer to the bone that the muscle is attached to. For detailed coverage of the body’s biochemical constituents, see protein; carbohydrate; lipid; nucleic acid; vitamin; and hormone. The parts of our body need blood in order to work properly – blood transports the nutrients each cell needs, and takes away any rubbish. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Vintage anatomy charts of the human body showing the skeletal and muscle systems. THE HUMAN BODY SYSTEMS System Function Diagram Major Organs Interactions- Working with Other Systems Digestive 1. take in food (ingestion) 2. digest food into smaller molecules and absorb nutrients 3. remove undigestable food from body (feces) Mouth, esophagus, stomach, Sm. From the pharynx there are two paths that the food bolus can take; 1) the wrong path, which is down the windpipe into the lungs, or 2) the correct path into the esophagus and then the stomach.The act of swallowing is a complex process that closes the windpipe (to protect our lungs) and moves food into the esophagus. The teeth are also part of the skeletal system, but they aren't considered bones. Human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems. The most basic unit is the cell; groups of similar cells form tissues; groups of different tissues make up organs; groups of organs form organ systems; cells, tissues, organs, and organ systems combine to form a multicellular organism. All of these ions play vital roles in the body’s metabolic processes. Editor’s Note: If you’d like more information on this topic, we recommend the following book (available on amazon.com): Stay up to date on the coronavirus outbreak by signing up to our newsletter today. Our editors will review what you’ve submitted and determine whether to revise the article. (4) The circulatory system, composed of the heart, blood, and blood vessels, circulates a transport fluid throughout the body, providing the cells with a steady supply of oxygen and nutrients and carrying away waste products such as carbon dioxide and toxic nitrogen compounds. For a description of how the body develops, from conception through old age, see aging; growth; prenatal development; human development. Of these features, the first two are present only during the embryonic stage in the human; the notochord is replaced by the vertebral column, and the pharyngeal gill slits are lost completely. Charged with producing new red and white blood cells, the bone marrow is a soft … During conception, a sperm cell fuses with an egg cell, which creates a fertilized egg that implants and grows in the uterus. The job of the circulatory system is to move blood, nutrients, oxygen, carbon dioxide, and hormones, around the body. Your body uses hormones to control growth, development, metabolism, reproduction, mood, and other functions. (6) The excretory system, composed of the kidneys, ureters, urinary bladder, and urethra, removes toxic nitrogen compounds and other wastes from the blood. Urine produced by the kidneys travels down the ureters to the bladder, and exits the body through the urethra. Proteins also perform numerous functional roles in the body. Many entries describe the body’s major structures. Every physical action that a person consciously performs (e.g. The next level of organization in the body is that of the organ. Does insulin regulate the level of sugar in the body? Body Parts! Urethra. (Bone and blood are considered specialized connective tissues, in which the intercellular matrix is, respectively, hard and liquid.). Other functions of the liver include blood … Well, sort of. Calcium is also present as ions in the blood and interstitial fluid, as is sodium. It is a female sex hormone released by the ovaries. Chemically, the human body consists mainly of water and of organic compounds—i.e., lipids, proteins, carbohydrates, and nucleic acids. Learn these parts of body names to increase your vocabulary words in English. The body includes nine major organ systems, each composed of various organs and tissues that work together as a functional unit. In addition to skin, the integumentary system includes hair and nails. Beyond these similarities, however, lie some profound differences. Nucleic acids make up the genetic materials of the body. The lymphatic system also removes excess lymph fluid from bodily tissues, and returns it to the blood. The dorsal nerve cord is the spinal cord in humans; it remains throughout life. The human femur can support a weight thirty times that of the human body, making it even stronger than steel. So also is collagen, the fibrous, elastic material that makes up much of the body’s skin, bones, tendons, and ligaments. It consists mainly of the trachea, the diaphragm and the lungs. The lungs are responsible for removing oxygen from the air we breathe and transferring it to our blood where it can be sent to our cells. Small amounts of carbohydrates also occur in cell membranes, but, in contrast to plants and many invertebrate animals, humans have little structural carbohydrate in their bodies. Omissions? The central nervous system includes the brain and spinal cord. 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2020 human body parts and their functions