What do organs make up

Particulates in the air can impact respiratory function. We are also affected by foods, exercise, sun exposure and other environmental conditions.

Privacy Policy. Skip to main content. Module 5: The Tissue Level of Organization. Search for:. Muscle tissue in turn divided into skeletal, smooth and cardiac is contractile. It allows locomotion of the body. It also allows necessary contractions of various organs such as the heart and of respiratory and digestive systems. It conducts signals between the nervous system and various organs.

Connective tissue holds the body together. It is found in most organs, anchoring them to the skeleton and other organs. Types of connective tissue include fibrous tissue, fatty tissue, loose tissue and cartilage. Connective tissue also includes bone, blood and lymph. Skin tissue helps to maintain homeostasis. It helps monitor and control temperature, and resists abrasion, foreign bodies and damaging chemicals. Internally, epithelial tissue lines most internal cavities, secreting or absorbing nutrients.

Licenses and Attributions. CC licensed content, Shared previously. It is present in almost every organ, forming a large part of skin, tendons, joints, ligaments, blood vessels, and muscles. The characteristics of connective tissue and the types of cells it contains vary, depending on where it is found in the body. Organs are the body's recognizable structures for example, the heart, lungs, liver, eyes, and stomach that perform specific functions.

An organ is made of several types of tissue and therefore several types of cells Cells Often thought of as the smallest unit of a living organism, a cell is made up of many even smaller parts, each with its own function.

Human cells vary in size, but all are quite small. For example, the heart Biology of the Heart The heart and blood vessels constitute the cardiovascular circulatory system. The heart pumps the blood to the lungs so it can pick up oxygen and then pumps oxygen-rich blood to the body The eye Structure and Function of the Eyes The structures and functions of the eyes are complex.

Each eye constantly adjusts the amount of light it lets in, focuses on objects near and far, and produces continuous images that are instantly Even an organ as apparently simple as the gallbladder Gallbladder and Biliary Tract The gallbladder is a small, pear-shaped, muscular storage sac that holds bile and is interconnected to the liver by ducts known as the biliary tract.

See also Overview of the Liver and Gallbladder The VA defines 14 disability systems , which are similar to the body systems. However, the disability systems are separated differently for rating purposes. These systems are listed with the medical listing and are identified independently when necessary. For Individual Unemployability ratings; if you are rated with more than one disability within one body system, your rating will increase towards unemployability. For this reason, we have outlined the VA defined body systems and have included a link to our VA Unemployability Calculator so you can see if your ratings make you eligible for Individual Unemployment.

Below is a description of the basic functions of each system as well as some of the diseases and disorders associated with each system. These lists are not complete and do not take the place of medical advice. It acts as a barrier to physical, chemical, and biological agents. The skin prevents water loss and regulates body temperature. It transmits the senses of touch, pain, and pleasure and maintains body temperature by secreting sweat. The hair lubricates the scalp, which secretes pheromones and cools or warms our heads.

The nails protect our fingers, which are a major tool used for protecting ourselves and providing ourselves with food, shelter, and sensations. The skin leaves us most vulnerable when it is compromised by open wounds, allowing infectious agents into the body. The ribs protect the abdominal organs, which are both vulnerable to injury and dangerous to our well being when injured. The skull protects our brain which controls all functions of our bodies and minds.

The skeleton provides the framework and shape to our bodies. It also connects to our major muscles to allow movement. Bones store minerals such as calcium and create blood cells in the soft bone tissue called marrow.

Bones can break easily without enough calcium and are subject to such diseases as arthritis; cancers; scoliosis; osteoporosis, gout; bursitis; fractures and breaks; and amputations. This system transports clean fluids in our body back to the blood and drains excess fluids and debris from the tissues and cells of the body. It also houses the white blood cells lymphocytes involved in protecting our bodies from infection. This system maintains our breathing. It supplies the body with oxygen for cellular respiration by collecting oxygen in the lungs and disposes of carbon dioxide by breathing out the waste product.

It also provides our functions of speech and smell. Diseases and disorders of the respiratory system include allergies; rhinitis and sinusitis; laryngitis; COPD; pleurisy; bronchitis; emphysema; asthma; sarcoidosis; fibrosis; asbestosis; pulmonary vascular diseases; fungal or bacterial infections of the lungs; sleep apnea; tuberculosis of the respiratory system; and lung, throat, and other respiratory cancers. Beginning with our mouths, this system is responsible for the breaking down and absorption of nutrients and the elimination of the waste not utilized by the body.

It is responsible for identifying which minerals, vitamins, and other essentials from the foods we eat can be absorbed and utilized or stored by the body and which are to be disposed of, and carrying out those functions. This system is actually made up of two distinct parts; the central nervous system CNS and the peripheral nervous system.

The central nervous system is made up of the brain and spinal cord, and the peripheral nervous system is made up of all the nerves that lead into and out of the CNS to other parts of the body.

The entire nervous system controls all of the other systems of the body, such as digestion and cardiac rhythm, and responds to internal and external changes, such as activating muscles and breathing. It also transmits information to the brain, such as pain and external sensations. For VA Rating: not included are the ovaries and testis The glands of the endocrine system secrete chemicals called hormones that regulate most of the processes in our bodies such as growth, reproduction, metabolism, and even the control of the amount of glucose in our blood.

The heart, made of cardiac muscle, pumps blood and blood vessels such as arteries and veins, transport the blood to every part of our body providing organs and muscles with nourishment. The blood carries oxygen, carbon dioxide, nutrients, waste and more throughout the body. Diseases and disorders associated with the cardiovascular system include myocardial infarction; coronary bypass surgery; arrhythmias; valve replacements; pacemakers; transplants; heart diseases ischemic; hypertensive; arteriosclerotic ; hypertension; aneurysms; fistulas; arteriosclerosis; anaphylaxis shock; varicose veins; cold weather injuries; and sarcomas of the blood vessels.

VA Equivalent for rating — The Genitourinary System also includes: prostate gland, penis, testis, scrotum, ductus deferens.