Human Body Excretory System and Kidneys

Posted by on May 3, 2024 in Biology | 0 comments

Kidneys are the body’s main excretory organs and form part of the urinary system. They purify the blood by forming urine and eliminating waste products like uric acid and urea, which are produced by cell activity. The kidneys are located in the abdomen.

Lungs are organs that form part of the respiratory system. They eliminate carbon dioxide from the blood, which is produced by chemical reactions in the cells.

Organs of the digestive system eliminate the residue from food digestion through defecation.

Read More

Environmental and Public Health Issues: Pollution, Disease, and Nutrition

Posted by on May 3, 2024 in Biology | 0 comments

Environmental and Public Health Issues

Air Pollution

Air pollution refers to the presence of harmful substances in the atmosphere, such as gases and particulate matter, that can negatively impact human health, the environment, and infrastructure.

Types of Air Pollutants

  • Primary pollutants: Emitted directly from sources like factories and vehicles (e.g., carbon monoxide, sulfur dioxide).
  • Secondary pollutants: Formed in the atmosphere through chemical reactions (e.g., ozone).
  • Particulate matter: Solid or
Read More

Types and Functions of Nephron in the Human Body

Posted by on May 3, 2024 in Biology | 0 comments

Types of Nephron

There are two types of nephron: • Cortical nephron
These are the nephrons present within the cortex. These are short and comprise about 80% of the total nephrons.

• Juxtamedullary nephron

These have long loops of Henle and extend into the medulla. These are about 20%.

Functions of Nephron

The primary function of nephron is removing all waste products including the solid wastes, and other excess water from the blood, converting blood into the urine, reabsorption, secretion, and excretion
Read More

Essential Nutrients and Dietary Guidelines for Optimal Health

Posted by on May 3, 2024 in Biology | 0 comments

Essential Nutrients for a Healthy Body

Proteins

Proteins are crucial for building and repairing tissues, especially during pregnancy, lactation, and infancy. They are composed of amino acids, with 8 essential ones that must be obtained from food. Proteins play a vital role in various functions, including:

  • Tissue growth and repair
  • Immune system function
  • Genetic transmission
  • Storage and transport of minerals like iron

Nutritional Needs: 0.8-1g per kg of body weight per day, which translates to 10-20% of

Read More

Waste Management: Classification, Treatment, and Hazards

Posted by on May 3, 2024 in Biology | 0 comments

Waste Classification and Treatment

Manual Triage Materials

The following materials are typically selected for manual triage during the waste management process:

  • Paper and paperboard
  • Hard plastics
  • Stained glass
  • White glass

Pneumatic System Materials

Plastic film is often separated using pneumatic systems.

Organic Matter

Organic matter remaining after the above processes is typically treated through one or more of the following methods, depending on the nature of the waste and the management model implemented:

Read More

First Aid Guide for Hemorrhages and Injuries

Posted by on May 3, 2024 in Biology | 0 comments

Hemorrhage

Hemorrhage refers to any leakage of blood from blood vessels. It can be classified as internal or external bleeding.

Symptoms of Hemorrhage

  • Pale, clammy skin
  • Cyanosis (bluish skin) if bleeding continues
  • Rapid, weak pulse
  • Rapid, shallow breathing
  • Confusion, restlessness, irritability
  • Possible unconsciousness
  • Visible bleeding (external hemorrhage)
  • Pain

Signs of Possible Internal Bleeding

  • Mouth: Bright red, frothy, or brown blood
  • Lung: Bright red, frothy blood
  • Stomach: Brown or black, grainy vomit
  • Ear:
Read More