Quick Answer: Which Is The Most Important Body System?

What are the 3 most important body systems?

The main systems of the human body are:Circulatory system / Cardiovascular system: …

Digestive system and Excretory system: …

Endocrine system: …

Integumentary system / Exocrine system: …

Immune system and lymphatic system: …

Muscular system: …

Nervous system: …

Renal system and Urinary system.More items….

What is the importance of body system in our body?

Body systems. Our bodies consist of a number of biological systems that carry out specific functions necessary for everyday living. The job of the circulatory system is to move blood, nutrients, oxygen, carbon dioxide, and hormones, around the body.

Which is the hardest part of human body?

Your teeth contain the hardest substance in the human body — your enamel. Bones aren’t quite as hard as enamel, but they rank closely on the hardness scale. Other parts of your body (like muscles, ligaments, and tendons) are incredibly strong, but don’t come close to the mineral-based tissue in your teeth and bones.

What are the 12 organs of the body?

They are the integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive systems. Only the reproductive system varies significantly between males and females.

What organ system is the skin in?

integumentary systemThe integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands.

Why is the nervous system the most important body system?

One of the most important systems in your body, the nervous system is your body’s control system. It sends, receives, and processes nerve impulses throughout the body. These nerve impulses tell your muscles and organs what to do and how to respond to the environment.

What’s the heaviest organ in the human body?

liverThe largest solid internal organ is your liver. It weighs approximately 3–3.5 pounds or 1.36–1.59 kilograms and is about the size of a football.

Can you live without a nervous system?

Without the nervous system our brain would be mush. It wouldn’t know anything that was going on in the outside world and wouldn’t be able to control our body. The brain and the spinal cord make up what is called the central nervous system. The rest of the nerves together are called the peripheral nervous system.

What is the most important part of the brain?

Medulla. The lowest part of the brainstem, the medulla is the most vital part of the entire brain and contains important control centers for the heart and lungs. Spinal cord.

What are the part of the body?

List of Human Body OrgansBrain.Trachea.Lungs.Heart.Liver.Stomach.Kidneys.Intestines (large intestine and small intestine)More items…

What is the most important function of all body systems?

Body Systems, Functions, and OrgansBody SystemPrimary FunctionCardiovascular/CirculatoryBlood circulationDigestiveProcessing foodEndocrineHormone productionUrinaryWaste elimination6 more rows

What is the most useless body part?

appendixThe appendix may be the most commonly known useless organ. While plant-eating vertebrates still rely on their appendix to help process plants, the organ is not part of the human digestive system.

What organs can you live without?

Here are some of the “non-vital organs”.Spleen. This organ sits on the left side of the abdomen, towards the back under the ribs. … Stomach. … Reproductive organs. … Colon. … Gallbladder. … Appendix. … Kidneys.

What is the longest thing in your body?

HumansThe longest bone in the human body is the femur.The largest artery is the aorta and the largest vein is the inferior vena cava.The largest internal organ (by mass) is the liver, with an average of 1.6 kilograms (3.5 pounds).The largest external organ, which is also the largest organ in general, is the skin.More items…

What are the 14 body systems?

These 14 systems are the Musculoskeletal system; Organs of Special Sense (optical); Auditory; Infectious Diseases, Immune Disorders, and Nutritional Deficiencies; Respiratory system; Cardiovascular system; Digestive system; Genitourinary System; Hemic and Lymphatic system; Skin; Endocrine system; Neurological …

Which organs in the cell works like brain?

The brains of all species are composed primarily of two broad classes of cells: neurons and glial cells. Glial cells (also known as glia or neuroglia) come in several types, and perform a number of critical functions, including structural support, metabolic support, insulation, and guidance of development.

How do we keep our body system healthy?

Here are seven ways to keep your organs healthy.Stay hydrated. … Eat a balanced diet. … Exercise consistently. … Be careful with supplements and over-the-counter medications. … Don’t smoke. … Keep blood sugar controlled. … Get checked.

How many systems are in our body?

The human body consists of eleven organ systems , each of which contains several specific organs . An organ is a unique anatomic structure consisting of groups of tissues that work in concert to perform specific functions. Table 1 includes the structures and functions of these eleven organ systems .