secretion in animals

• All living organisms produce waste products through biological processes, and continuous removal of these waste products is crucial to prevent health issues and infections.
• Excretion is a vital process where organisms eliminate harmful metabolic waste products.
• Materials leaving the body through plasma membranes include water, CO2, and nitrogenous waste products such as ammonia, urea, and uric acid.
• Undigested food exits as feces without passing through cell membranes.
• Nitrogen entering and leaving lungs during respiration isn't considered excretory.
• Vertebrates excrete different nitrogenous waste based on their environment: aquatic animals excrete ammonia, amphibians, mammals excrete urea, insects, reptiles, birds excrete uric acid.
• Excretory organs perform functions such as disposal of damaged and poisonous materials and regulation of body water and mineral content.
• Important excretory organs include the skin, two lungs, two kidneys, and liver.
• Excretion is vital because it helps living organisms eliminate waste products generated during biological processes, preventing their harmful accumulation.
• The main waste products for excretion are water, CO2, and nitrogenous compounds like ammonia, urea, and uric acid.
• Aquatic animals excrete highly soluble ammonia; amphibians and mammals excrete urea, while insects, reptiles, and birds excrete insoluble uric acid in the form of crystals.
• The accumulation of waste products inside the body can cause problems and infections, emphasizing the importance of continuous excretion.
• The important excretory organs in the bodies of higher animals mentioned in the text are the skin, two lungs, two kidneys, and the liver.
• The skin serves as an excretory organ by releasing water and small amounts of waste products through sweating.
• Amphibians and mammals excrete urea as their nitrogenous waste product.
• Insects, reptiles, and birds excrete uric acid in the form of crystals.
• The functions of excretory organs include the disposal of damaged and poisonous materials and the regulation of water and mineral content in the body.
• Nitrogen entering and leaving the lungs during respiration is not considered an excretory product because it doesn't pass through the plasma membranes of cells; it simply enters and leaves the lungs through respiration.
• Excretion is vital because it helps living organisms eliminate waste products generated during biological processes, preventing their harmful accumulation.
• The main waste products for excretion are water, CO2, and nitrogenous compounds like ammonia, urea, and uric acid.
• Aquatic animals excrete highly soluble ammonia; amphibians and mammals excrete urea, while insects, reptiles, and birds excrete insoluble uric acid in the form of crystals.
• The accumulation of waste products inside the body can cause problems and infections, emphasizing the importance of continuous excretion.
• The important excretory organs mentioned are the skin, two lungs, two kidneys, and the liver.
• The skin serves as an excretory organ by releasing water and small amounts of waste products through sweating.
• Amphibians and mammals excrete urea as their nitrogenous waste product.
• Insects, reptiles, and birds excrete uric acid in the form of crystals.
• The functions of excretory organs include the disposal of damaged and poisonous materials and the regulation of water and mineral content in the body.
• Nitrogen entering and leaving the lungs during respiration is not considered an excretory product because it doesn't pass through the plasma membranes of cells; it simply enters and leaves the lungs through respiration.