Question: What Are The 3 Most Important Body Systems?

Which body system is the least important?

The appendix is essentially the least important organ..

What is the heaviest organ in the human body?

liverWhat’s the largest solid internal organ? The 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. Your liver is located beneath your rib cage and lungs, in the upper right area of your abdomen.

What is the most important body system and why?

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.

What are the 13 systems in the human body?

The main systems of the human body are:Circulatory 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 are the two most important systems in the human body?

The nervous system is made up of two major parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The central nervous system is made up of the brain and spinal cord and acts as the main control system for the body.

What system absorbs oxygen?

respiratory systemYour respiratory system is the network of organs and tissues that help you breathe. This system helps your body absorb oxygen from the air so your organs can work. It also cleans waste gases, such as carbon dioxide, from your blood.

Is the tongue an organ?

The tongue is a muscular organ in the mouth. The tongue is covered with moist, pink tissue called mucosa. Tiny bumps called papillae give the tongue its rough texture. Thousands of taste buds cover the surfaces of the papillae.

What is the most useless body part?

appendixThe appendix may be the most commonly known useless organ.

Which body part is only found on humans?

Found only in humans, the hyoid bone is the only bone in the body that is not connected to any other, and is the foundation of speech. This horseshoe-shaped bone in the throat is situated between the chin and the thyroid cartilage.

What are the 11 systems in the human body?

There are 11 major organ systems in the human organism. They are the integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive systems.

What is the most important function of all body systems?

Body SystemPrimary FunctionNervous/SensoryCommunication between and coordination of all the body systemsIntegumentaryProtects against damageMuscular/SkeletalProvides form, support, stability, and movement to the bodyHematopoietic/LymphaticBlood production, maintenance of fluid balance, and defense against disease6 more rows

Which organ do we not need?

Vestigial organsVestigial organs are parts of the body that once had a function but are now more-or-less useless. Probably the most famous example is the appendix, though it is now an open question whether the appendix is really vestigial.

What organs can I 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 your largest organ?

Skin is the human body’s largest organ. Body organs aren’t all internal like the brain or the heart. There’s one we wear on the outside. Skin is our largest organ—adults carry some 8 pounds (3.6 kilograms) and 22 square feet (2 square meters) of it.

What is the most important body system?

Many of you are probably thinking the heart. While your heart is a vital organ, the brain and of course the nervous system that attaches to your brain make up the most critical organ system in the human body. The human nervous system is responsible for coordinating every movement or action your body takes.

What are the 12 organs of the body?

Some of the easily recognisable internal organs and their associated functions are:The brain. The brain is the control centre of the nervous system and is located within the skull. … The lungs. … The liver. … The bladder. … The kidneys. … The heart. … The stomach. … The intestines.