Sickle cell anemia is a heritable disorder that results from a mutation in the gene for hemoglobin, the protein that carries oxygen from the lungs to the tissues. The disease affects many different cell types, leading to symptoms including pain...
One of the major functions of the blood is to carry oxygen from the lungs to the tissues. To accomplish this, the blood relies on a protein called hemoglobin, which binds to oxygen at the lungs and releases it at the cells. Red blood cells are...
Most tissues of the body are fixed in position. Some tissues such as muscles are able to contract to provide a force to perform work; blood is an exception to this because it is constantly in motion to function properly. Blood consists of a liquid...
The eyes are complex organs that allow for light and color perception. Each eye contains a number of tissues including nerve tissue that transmits visual information for processing within the brain, muscle and connective tissue that support eye...
Obesity, or being severely overweight, is a major concern these days due to the many health risks and problems that may arise. Obesity is caused by the excessive storage of adipose tissue, or fat, underneath the skin. Adipose tissue is also found...
The human body holds more than 100 trillion cells, according to the National Institute of Child Health and Human Development. Human cells are small, too tiny to be seen without using a microscope, but they make up all of the organs and systems of...
The lungs perform the essential function of inspiration to allow for the transfer of gasses between the air and the bloodstream. During each breath, oxygen from the inhaled air diffuses into the bloodstream to allow for oxygenation of tissues, and...
The health of your cells depends on the basic principles of consuming a healthy diet, receiving enough rest and performing a regular exercise routine. According to the John Hopkins Medicine Group, cells require a constant supply of oxygen to...
Sexual FAQs - Sperm Cell or Spermatozoa The mature sperm cell (spermatozoa) is 0.05mm long. It consists of a head, body and tail. The head is covered by the ac cap and contains a nucleus of dense genetic material from the 23 chromosomes. It is...
Lymphocytes, a type of white blood cell, develop in the bone marrow and then move into the bloodstream. One of the main components of the immune system, these types of cells circulate in the blood searching for particles called antigens that...
Fat cells are called adipocytes, from "adipose," meaning "fat" and -cyte, meaning "cells." Adipocytes are abundant and make up roughly 18 percent of an individual's body weight. People are born with a certain number of fat cells and will not gain...
Antibodies are protein molecules that attach themselves to invading pathogens, such as bacteria and viruses, marking those pathogens for destruction by other components of the immune system. The immune system is complex, and proper function...
Millions of people in the United States and around the world are overweight or obese, according to the National Heart, Lung and Blood Institute. Each time you consume a calorie that your body doesn't need for energy, it is stored in your fat...
Radiation refers to a wide variety of phenomena, but in common parlance "radiation" is typically used interchangeably with what is scientifically called "ionizing radiation." Ionizing rays are electromagnetic disturbances, including X-rays and...
Diabetes is a disease in which body cells are unable to extract glucose, or blood sugar, from the bloodstream. This leads to high blood sugar, which can be very damaging to the organs, as well as causing cellular starvation, since cells utilize...
Sperm cells, also known as spermatozoa, swim in semen that is produced in the testes of males. Their main function is to fertilize the egg in the process of conception. According to the World Health Organization, a healthy sperm count is 20...
The adrenal glands are a pair of organs above the kidneys which produce hormones. The outer covering is called the adrenal cortex and is comprised of three layers: the zona glomerulosa, the zona fasciculata and the zona reticularis. The inner core...
The blood is a complex chemical soup made up of water-based plasma, several types of cells and a wide variety of molecules. It serves many purposes in the body, from transporting oxygen and nutrients to cells to allowing cell-to-cell communication...
Cancer cells are cells that no longer have control over their rate of growth or death. All cells of the body grow and die at a rate determined by genetic instructions. Normal cells may become cancer cells if a change occurs in the genes that...
White blood cells, also called leukocytes, are a part of the body's immune system. Produced in the bone marrow, these cells attack foreign invaders that cause infection and disease. However, it is possible that some medical conditions and...
The average consumer won't buy solar cells individually, as the cells are preinstalled in solar panels and traditionally last a long time. To give you an idea how long, many solar panels come with 25-year warranties. But it's still important to be...
The respiratory epithelium is the lining of the airway, extending from the nasal cavity through the branching respiratory tree to the terminal air sacs of the lungs. Together, the respiratory epithelium serves as a leak-proof barrier that...
Blood contains a liquid portion, known as plasma, which consists of 90 percent water, according to the Franklin Institute. The plasma functions to carry the different types of blood cells, including red cells that carry oxygen, white cells that...
Electricity is a requirement for many reasons in homes and businesses. For climate control, electricity is used to power air conditioning units and heaters. It is also used to supply light and power appliances. Traditional supplies of electricity...
The Immunology Department of Western Kentucky University reports on Bioweb that the body produces more than 5 million B cells every day that enter the bloodstream and lymphatic system. B cells perform the role of immune surveillance and...
The human brain weighs between 1.3 and 1.4 kilograms and has 100 billion neurons, which are the cells in the brain that transmit electrical signals. But neurons are not the only cells found in the brain. The other groups of cells, the glial cells,...
The massive diet industry is a testament to America's struggle with fat loss. The way fat cells behave in the body may help researchers find a way to intervene in cases of obesity and help reduce total body fat percentage permanently. Learning how...
Solar power is a clean, renewable energy source, but it does have some disadvantages. If you plan to add solar cells to your home, research the pros and cons of the technology with care. Compare different models and look for one that works well...
The number of fat cells you have in your body does not increase or decrease over time, rather the size of them increases or decreases. The number of fat cells a person has in her body is set by the time she goes through puberty. As an adult, you...
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