The study of the human body involves anatomy, physiology, histology and embryology. The body varies anatomically in known ways. Physiology focuses on the systems and organs of the human body and their functions.
Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.
The main systems of the human body are:Circulatory system. ... Digestive system / Excretory system: ... Endocrine system: ... Integumentary system/ Exocrine system: ... Lymphatic system / Immune system: ... Muscular system. ... Nervous system: ... Renal system / Urinary system:More items...
Our body contains 11 organ systems which include:Integumentary.Muscular.Skeletal.Nervous.Circulatory.Lymphatic.Respiratory.Endocrine.More items...
The most important part of your body is your Brain and Nerve System.
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.Aug 6, 2013
However, let's take a look at ten of the most important organs of the human body.The Bladder. When we eat food some is digested and some needs to be removed from the system. ... The Skin. ... The Small and Large Intestines. ... The Kidneys. ... The Spleen. ... The Stomach. ... The Liver. ... The Lungs.More items...
Humans have five vital organs that are essential for survival. These are the brain, heart, kidneys, liver and lungs. The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones.Mar 10, 2016
These include the nose, pharynx, larynx, trachea, bronchi and lungs. The respiratory system does two very important things: it brings oxygen into our bodies, which we need for our cells to live and function properly; and it helps us get rid of carbon dioxide, which is a waste product of cellular function.
Mitosis happens when a parent cell divides, creating two identical copies, referred to as daughter cells. During this process, it is essential that the daughter cells are exactly the same with the same copies of DNA.Mitosis is important because it is essential for growth and repair in the body.
Lipids have several important roles in the body, providing: a source and store of energy. an important part of the membrane surrounding every body cell. the basic building blocks from which several hormones (chemical messengers) and bile acids (digestive juices) are made.
Once inside, they find a host cell to infect. For example, cold and flu viruses will attack cells that line the respiratory or digestive tracts. The human immunodeficiency virus (HIV), which causes AIDS, attacks the T-cells of the immune system.
Although neon is the forth most abundant element in the universe, only 0.0018% in volume of the earth's atmosphere is neon. ... Neon is a rare gas that is found in the Earth's atmosphere at 1 part in 65,000. Health effects of neon. Routes of exposure: The substance can be absorbed into the body by inhalation.
Gas collects in two main ways. Swallowing air while you eat or drink can cause oxygen and nitrogen to collect in the digestive tract. Second, as you digest food, digestive gases such as hydrogen, methane, and carbon dioxide collect. Either method can cause flatulence.Mar 2, 2016
Cellulose is a type of polysaccharide plant fiber. Polysaccharide fiber is a carbohydrate composed of linked sugar molecules, however, humans lack the enzyme necessary to break cellulose down into component sugars, allowing your body to absorb it.
Young children are particularly vulnerable to the toxic effects of lead and can suffer profound and permanent adverse health effects, particularly affecting the development of the brain and nervous system. Lead also causes long-term harm in adults, including increased risk of high blood pressure and kidney damage.
Vitamins-what vitamins the body produces. The human body can produce vitamin D and vitamin K. Vitamin K is a vitamin that acts in the liver, affecting the manufacture of the substances that makes the blood.
VITAMIN A. GOOD FOR: Healthy eyes and general growth and development, including healthy teeth and skin. ... B VITAMINS. GOOD FOR: Energy production, immune function and iron absorption. ... VITAMIN C. ... VITAMIN D. ... VITAMIN E. ... VITAMIN K. ... FOLIC ACID. ... CALCIUM.More items...
Dietary fats are essential to give your body energy and to support cell growth. They also help protect your organs and help keep your body warm. Fats help your body absorb some nutrients and produce important hormones, too. Your body definitely needs fat.
Proteins also carry vitamins, such as vitamin A, from your organs to your cells. A specific protein in your red blood cells, hemoglobin, is responsible for carrying oxygen from your lungs to your cells. Hemoglobin also takes carbon dioxide from your cells to your lungs, so that it can be expelled from the body.
When it's cold outside, tiny muscles surrounding the hair follicle cause the hairs to stand up, to trap more heat near the body. This is what happens when you get goosebumps. So those tiny hairs all over our bodies make sense. As do nostril hairs and eyelashes, which keep dirt out of our bodies.Sep 30, 2015
The bone marrow produces stem cells, the building blocks that the body uses to make the different blood cells – red cells, white cells and platelets. The erythropoietin sends a message to the stem cells telling more of them to develop into red blood cells, rather than white cells or platelets.
So here are the top five strongest muscles in the body based on these different ways to measure strength:Heart. The heart, which consists of cardiac muscle, is said to be the hardest working muscle in the body. ... Masseter. ... Soleus. ... Gluteus Maximus. ... Uterus.